drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 1999 - 2018 Intel Corporation. */
   3
   4 /******************************************************************************
   5  Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
   6 ******************************************************************************/
   7
   8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/types.h>
  11 #include <linux/bitops.h>
  12 #include <linux/module.h>
  13 #include <linux/pci.h>
  14 #include <linux/netdevice.h>
  15 #include <linux/vmalloc.h>
  16 #include <linux/string.h>
  17 #include <linux/in.h>
  18 #include <linux/ip.h>
  19 #include <linux/tcp.h>
  20 #include <linux/sctp.h>
  21 #include <linux/ipv6.h>
  22 #include <linux/slab.h>
  23 #include <net/checksum.h>
  24 #include <net/ip6_checksum.h>
  25 #include <linux/ethtool.h>
  26 #include <linux/if.h>
  27 #include <linux/if_vlan.h>
  28 #include <linux/prefetch.h>
  29 #include <net/mpls.h>
  30 #include <linux/bpf.h>
  31 #include <linux/bpf_trace.h>
  32 #include <linux/atomic.h>
  33
  34 #include "ixgbevf.h"
  35
  36 const char ixgbevf_driver_name[] = "ixgbevf";
  37 static const char ixgbevf_driver_string[] =
  38         "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
  39
  40 #define DRV_VERSION "4.1.0-k"
  41 const char ixgbevf_driver_version[] = DRV_VERSION;
  42 static char ixgbevf_copyright[] =
  43         "Copyright (c) 2009 - 2018 Intel Corporation.";
  44
  45 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  46         [board_82599_vf]        = &ixgbevf_82599_vf_info,
  47         [board_82599_vf_hv]     = &ixgbevf_82599_vf_hv_info,
  48         [board_X540_vf]         = &ixgbevf_X540_vf_info,
  49         [board_X540_vf_hv]      = &ixgbevf_X540_vf_hv_info,
  50         [board_X550_vf]         = &ixgbevf_X550_vf_info,
  51         [board_X550_vf_hv]      = &ixgbevf_X550_vf_hv_info,
  52         [board_X550EM_x_vf]     = &ixgbevf_X550EM_x_vf_info,
  53         [board_X550EM_x_vf_hv]  = &ixgbevf_X550EM_x_vf_hv_info,
  54         [board_x550em_a_vf]     = &ixgbevf_x550em_a_vf_info,
  55 };
  56
  57 /* ixgbevf_pci_tbl - PCI Device ID Table
  58  *
  59  * Wildcard entries (PCI_ANY_ID) should come last
  60  * Last entry must be all 0s
  61  *
  62  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  63  *   Class, Class Mask, private data (not used) }
  64  */
  65 static const struct pci_device_id ixgbevf_pci_tbl[] = {
  66         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
  67         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF_HV), board_82599_vf_hv },
  68         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
  69         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF_HV), board_X540_vf_hv },
  70         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF), board_X550_vf },
  71         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550_VF_HV), board_X550_vf_hv },
  72         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF), board_X550EM_x_vf },
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_X_VF_HV), board_X550EM_x_vf_hv},
  74         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X550EM_A_VF), board_x550em_a_vf },
  75         /* required last entry */
  76         {0, }
  77 };
  78 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  79
  80 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  81 MODULE_DESCRIPTION("Intel(R) 10 Gigabit Virtual Function Network Driver");
  82 MODULE_LICENSE("GPL v2");
  83 MODULE_VERSION(DRV_VERSION);
  84
  85 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  86 static int debug = -1;
  87 module_param(debug, int, 0);
  88 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  89
  90 static struct workqueue_struct *ixgbevf_wq;
  91
  92 static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
  93 {
  94         if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
  95             !test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
  96             !test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
  97                 queue_work(ixgbevf_wq, &adapter->service_task);
  98 }
  99
 100 static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
 101 {
 102         BUG_ON(!test_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state));
 103
 104         /* flush memory to make sure state is correct before next watchdog */
 105         smp_mb__before_atomic();
 106         clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
 107 }
 108
 109 /* forward decls */
 110 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter);
 111 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
 112 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
 113 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer);
 114 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
 115                                   struct ixgbevf_rx_buffer *old_buff);
 116
 117 static void ixgbevf_remove_adapter(struct ixgbe_hw *hw)
 118 {
 119         struct ixgbevf_adapter *adapter = hw->back;
 120
 121         if (!hw->hw_addr)
 122                 return;
 123         hw->hw_addr = NULL;
 124         dev_err(&adapter->pdev->dev, "Adapter removed\n");
 125         if (test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
 126                 ixgbevf_service_event_schedule(adapter);
 127 }
 128
 129 static void ixgbevf_check_remove(struct ixgbe_hw *hw, u32 reg)
 130 {
 131         u32 value;
 132
 133         /* The following check not only optimizes a bit by not
 134          * performing a read on the status register when the
 135          * register just read was a status register read that
 136          * returned IXGBE_FAILED_READ_REG. It also blocks any
 137          * potential recursion.
 138          */
 139         if (reg == IXGBE_VFSTATUS) {
 140                 ixgbevf_remove_adapter(hw);
 141                 return;
 142         }
 143         value = ixgbevf_read_reg(hw, IXGBE_VFSTATUS);
 144         if (value == IXGBE_FAILED_READ_REG)
 145                 ixgbevf_remove_adapter(hw);
 146 }
 147
 148 u32 ixgbevf_read_reg(struct ixgbe_hw *hw, u32 reg)
 149 {
 150         u8 __iomem *reg_addr = READ_ONCE(hw->hw_addr);
 151         u32 value;
 152
 153         if (IXGBE_REMOVED(reg_addr))
 154                 return IXGBE_FAILED_READ_REG;
 155         value = readl(reg_addr + reg);
 156         if (unlikely(value == IXGBE_FAILED_READ_REG))
 157                 ixgbevf_check_remove(hw, reg);
 158         return value;
 159 }
 160
 161 /**
 162  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 163  * @adapter: pointer to adapter struct
 164  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 165  * @queue: queue to map the corresponding interrupt to
 166  * @msix_vector: the vector to map to the corresponding queue
 167  **/
 168 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 169                              u8 queue, u8 msix_vector)
 170 {
 171         u32 ivar, index;
 172         struct ixgbe_hw *hw = &adapter->hw;
 173
 174         if (direction == -1) {
 175                 /* other causes */
 176                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 177                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 178                 ivar &= ~0xFF;
 179                 ivar |= msix_vector;
 180                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 181         } else {
 182                 /* Tx or Rx causes */
 183                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 184                 index = ((16 * (queue & 1)) + (8 * direction));
 185                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 186                 ivar &= ~(0xFF << index);
 187                 ivar |= (msix_vector << index);
 188                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 189         }
 190 }
 191
 192 static u64 ixgbevf_get_tx_completed(struct ixgbevf_ring *ring)
 193 {
 194         return ring->stats.packets;
 195 }
 196
 197 static u32 ixgbevf_get_tx_pending(struct ixgbevf_ring *ring)
 198 {
 199         struct ixgbevf_adapter *adapter = netdev_priv(ring->netdev);
 200         struct ixgbe_hw *hw = &adapter->hw;
 201
 202         u32 head = IXGBE_READ_REG(hw, IXGBE_VFTDH(ring->reg_idx));
 203         u32 tail = IXGBE_READ_REG(hw, IXGBE_VFTDT(ring->reg_idx));
 204
 205         if (head != tail)
 206                 return (head < tail) ?
 207                         tail - head : (tail + ring->count - head);
 208
 209         return 0;
 210 }
 211
 212 static inline bool ixgbevf_check_tx_hang(struct ixgbevf_ring *tx_ring)
 213 {
 214         u32 tx_done = ixgbevf_get_tx_completed(tx_ring);
 215         u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
 216         u32 tx_pending = ixgbevf_get_tx_pending(tx_ring);
 217
 218         clear_check_for_tx_hang(tx_ring);
 219
 220         /* Check for a hung queue, but be thorough. This verifies
 221          * that a transmit has been completed since the previous
 222          * check AND there is at least one packet pending. The
 223          * ARMED bit is set to indicate a potential hang.
 224          */
 225         if ((tx_done_old == tx_done) && tx_pending) {
 226                 /* make sure it is true for two checks in a row */
 227                 return test_and_set_bit(__IXGBEVF_HANG_CHECK_ARMED,
 228                                         &tx_ring->state);
 229         }
 230         /* reset the countdown */
 231         clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &tx_ring->state);
 232
 233         /* update completed stats and continue */
 234         tx_ring->tx_stats.tx_done_old = tx_done;
 235
 236         return false;
 237 }
 238
 239 static void ixgbevf_tx_timeout_reset(struct ixgbevf_adapter *adapter)
 240 {
 241         /* Do the reset outside of interrupt context */
 242         if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 243                 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
 244                 ixgbevf_service_event_schedule(adapter);
 245         }
 246 }
 247
 248 /**
 249  * ixgbevf_tx_timeout - Respond to a Tx Hang
 250  * @netdev: network interface device structure
 251  **/
 252 static void ixgbevf_tx_timeout(struct net_device *netdev)
 253 {
 254         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
 255
 256         ixgbevf_tx_timeout_reset(adapter);
 257 }
 258
 259 /**
 260  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 261  * @q_vector: board private structure
 262  * @tx_ring: tx ring to clean
 263  * @napi_budget: Used to determine if we are in netpoll
 264  **/
 265 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
 266                                  struct ixgbevf_ring *tx_ring, int napi_budget)
 267 {
 268         struct ixgbevf_adapter *adapter = q_vector->adapter;
 269         struct ixgbevf_tx_buffer *tx_buffer;
 270         union ixgbe_adv_tx_desc *tx_desc;
 271         unsigned int total_bytes = 0, total_packets = 0, total_ipsec = 0;
 272         unsigned int budget = tx_ring->count / 2;
 273         unsigned int i = tx_ring->next_to_clean;
 274
 275         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 276                 return true;
 277
 278         tx_buffer = &tx_ring->tx_buffer_info[i];
 279         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
 280         i -= tx_ring->count;
 281
 282         do {
 283                 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
 284
 285                 /* if next_to_watch is not set then there is no work pending */
 286                 if (!eop_desc)
 287                         break;
 288
 289                 /* prevent any other reads prior to eop_desc */
 290                 smp_rmb();
 291
 292                 /* if DD is not set pending work has not been completed */
 293                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 294                         break;
 295
 296                 /* clear next_to_watch to prevent false hangs */
 297                 tx_buffer->next_to_watch = NULL;
 298
 299                 /* update the statistics for this packet */
 300                 total_bytes += tx_buffer->bytecount;
 301                 total_packets += tx_buffer->gso_segs;
 302                 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_IPSEC)
 303                         total_ipsec++;
 304
 305                 /* free the skb */
 306                 if (ring_is_xdp(tx_ring))
 307                         page_frag_free(tx_buffer->data);
 308                 else
 309                         napi_consume_skb(tx_buffer->skb, napi_budget);
 310
 311                 /* unmap skb header data */
 312                 dma_unmap_single(tx_ring->dev,
 313                                  dma_unmap_addr(tx_buffer, dma),
 314                                  dma_unmap_len(tx_buffer, len),
 315                                  DMA_TO_DEVICE);
 316
 317                 /* clear tx_buffer data */
 318                 dma_unmap_len_set(tx_buffer, len, 0);
 319
 320                 /* unmap remaining buffers */
 321                 while (tx_desc != eop_desc) {
 322                         tx_buffer++;
 323                         tx_desc++;
 324                         i++;
 325                         if (unlikely(!i)) {
 326                                 i -= tx_ring->count;
 327                                 tx_buffer = tx_ring->tx_buffer_info;
 328                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
 329                         }
 330
 331                         /* unmap any remaining paged data */
 332                         if (dma_unmap_len(tx_buffer, len)) {
 333                                 dma_unmap_page(tx_ring->dev,
 334                                                dma_unmap_addr(tx_buffer, dma),
 335                                                dma_unmap_len(tx_buffer, len),
 336                                                DMA_TO_DEVICE);
 337                                 dma_unmap_len_set(tx_buffer, len, 0);
 338                         }
 339                 }
 340
 341                 /* move us one more past the eop_desc for start of next pkt */
 342                 tx_buffer++;
 343                 tx_desc++;
 344                 i++;
 345                 if (unlikely(!i)) {
 346                         i -= tx_ring->count;
 347                         tx_buffer = tx_ring->tx_buffer_info;
 348                         tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
 349                 }
 350
 351                 /* issue prefetch for next Tx descriptor */
 352                 prefetch(tx_desc);
 353
 354                 /* update budget accounting */
 355                 budget--;
 356         } while (likely(budget));
 357
 358         i += tx_ring->count;
 359         tx_ring->next_to_clean = i;
 360         u64_stats_update_begin(&tx_ring->syncp);
 361         tx_ring->stats.bytes += total_bytes;
 362         tx_ring->stats.packets += total_packets;
 363         u64_stats_update_end(&tx_ring->syncp);
 364         q_vector->tx.total_bytes += total_bytes;
 365         q_vector->tx.total_packets += total_packets;
 366         adapter->tx_ipsec += total_ipsec;
 367
 368         if (check_for_tx_hang(tx_ring) && ixgbevf_check_tx_hang(tx_ring)) {
 369                 struct ixgbe_hw *hw = &adapter->hw;
 370                 union ixgbe_adv_tx_desc *eop_desc;
 371
 372                 eop_desc = tx_ring->tx_buffer_info[i].next_to_watch;
 373
 374                 pr_err("Detected Tx Unit Hang%s\n"
 375                        "  Tx Queue             <%d>\n"
 376                        "  TDH, TDT             <%x>, <%x>\n"
 377                        "  next_to_use          <%x>\n"
 378                        "  next_to_clean        <%x>\n"
 379                        "tx_buffer_info[next_to_clean]\n"
 380                        "  next_to_watch        <%p>\n"
 381                        "  eop_desc->wb.status  <%x>\n"
 382                        "  time_stamp           <%lx>\n"
 383                        "  jiffies              <%lx>\n",
 384                        ring_is_xdp(tx_ring) ? " XDP" : "",
 385                        tx_ring->queue_index,
 386                        IXGBE_READ_REG(hw, IXGBE_VFTDH(tx_ring->reg_idx)),
 387                        IXGBE_READ_REG(hw, IXGBE_VFTDT(tx_ring->reg_idx)),
 388                        tx_ring->next_to_use, i,
 389                        eop_desc, (eop_desc ? eop_desc->wb.status : 0),
 390                        tx_ring->tx_buffer_info[i].time_stamp, jiffies);
 391
 392                 if (!ring_is_xdp(tx_ring))
 393                         netif_stop_subqueue(tx_ring->netdev,
 394                                             tx_ring->queue_index);
 395
 396                 /* schedule immediate reset if we believe we hung */
 397                 ixgbevf_tx_timeout_reset(adapter);
 398
 399                 return true;
 400         }
 401
 402         if (ring_is_xdp(tx_ring))
 403                 return !!budget;
 404
 405 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 406         if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
 407                      (ixgbevf_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
 408                 /* Make sure that anybody stopping the queue after this
 409                  * sees the new next_to_clean.
 410                  */
 411                 smp_mb();
 412
 413                 if (__netif_subqueue_stopped(tx_ring->netdev,
 414                                              tx_ring->queue_index) &&
 415                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 416                         netif_wake_subqueue(tx_ring->netdev,
 417                                             tx_ring->queue_index);
 418                         ++tx_ring->tx_stats.restart_queue;
 419                 }
 420         }
 421
 422         return !!budget;
 423 }
 424
 425 /**
 426  * ixgbevf_rx_skb - Helper function to determine proper Rx method
 427  * @q_vector: structure containing interrupt and ring information
 428  * @skb: packet to send up
 429  **/
 430 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
 431                            struct sk_buff *skb)
 432 {
 433         napi_gro_receive(&q_vector->napi, skb);
 434 }
 435
 436 #define IXGBE_RSS_L4_TYPES_MASK \
 437         ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
 438          (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
 439          (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
 440          (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
 441
 442 static inline void ixgbevf_rx_hash(struct ixgbevf_ring *ring,
 443                                    union ixgbe_adv_rx_desc *rx_desc,
 444                                    struct sk_buff *skb)
 445 {
 446         u16 rss_type;
 447
 448         if (!(ring->netdev->features & NETIF_F_RXHASH))
 449                 return;
 450
 451         rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
 452                    IXGBE_RXDADV_RSSTYPE_MASK;
 453
 454         if (!rss_type)
 455                 return;
 456
 457         skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
 458                      (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
 459                      PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
 460 }
 461
 462 /**
 463  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 464  * @ring: structure containig ring specific data
 465  * @rx_desc: current Rx descriptor being processed
 466  * @skb: skb currently being received and modified
 467  **/
 468 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
 469                                        union ixgbe_adv_rx_desc *rx_desc,
 470                                        struct sk_buff *skb)
 471 {
 472         skb_checksum_none_assert(skb);
 473
 474         /* Rx csum disabled */
 475         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 476                 return;
 477
 478         /* if IP and error */
 479         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_IPCS) &&
 480             ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_IPE)) {
 481                 ring->rx_stats.csum_err++;
 482                 return;
 483         }
 484
 485         if (!ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_L4CS))
 486                 return;
 487
 488         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_ERR_TCPE)) {
 489                 ring->rx_stats.csum_err++;
 490                 return;
 491         }
 492
 493         /* It must be a TCP or UDP packet with a valid checksum */
 494         skb->ip_summed = CHECKSUM_UNNECESSARY;
 495 }
 496
 497 /**
 498  * ixgbevf_process_skb_fields - Populate skb header fields from Rx descriptor
 499  * @rx_ring: rx descriptor ring packet is being transacted on
 500  * @rx_desc: pointer to the EOP Rx descriptor
 501  * @skb: pointer to current skb being populated
 502  *
 503  * This function checks the ring, descriptor, and packet information in
 504  * order to populate the checksum, VLAN, protocol, and other fields within
 505  * the skb.
 506  **/
 507 static void ixgbevf_process_skb_fields(struct ixgbevf_ring *rx_ring,
 508                                        union ixgbe_adv_rx_desc *rx_desc,
 509                                        struct sk_buff *skb)
 510 {
 511         ixgbevf_rx_hash(rx_ring, rx_desc, skb);
 512         ixgbevf_rx_checksum(rx_ring, rx_desc, skb);
 513
 514         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_VP)) {
 515                 u16 vid = le16_to_cpu(rx_desc->wb.upper.vlan);
 516                 unsigned long *active_vlans = netdev_priv(rx_ring->netdev);
 517
 518                 if (test_bit(vid & VLAN_VID_MASK, active_vlans))
 519                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
 520         }
 521
 522         if (ixgbevf_test_staterr(rx_desc, IXGBE_RXDADV_STAT_SECP))
 523                 ixgbevf_ipsec_rx(rx_ring, rx_desc, skb);
 524
 525         skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 526 }
 527
 528 static
 529 struct ixgbevf_rx_buffer *ixgbevf_get_rx_buffer(struct ixgbevf_ring *rx_ring,
 530                                                 const unsigned int size)
 531 {
 532         struct ixgbevf_rx_buffer *rx_buffer;
 533
 534         rx_buffer = &rx_ring->rx_buffer_info[rx_ring->next_to_clean];
 535         prefetchw(rx_buffer->page);
 536
 537         /* we are reusing so sync this buffer for CPU use */
 538         dma_sync_single_range_for_cpu(rx_ring->dev,
 539                                       rx_buffer->dma,
 540                                       rx_buffer->page_offset,
 541                                       size,
 542                                       DMA_FROM_DEVICE);
 543
 544         rx_buffer->pagecnt_bias--;
 545
 546         return rx_buffer;
 547 }
 548
 549 static void ixgbevf_put_rx_buffer(struct ixgbevf_ring *rx_ring,
 550                                   struct ixgbevf_rx_buffer *rx_buffer,
 551                                   struct sk_buff *skb)
 552 {
 553         if (ixgbevf_can_reuse_rx_page(rx_buffer)) {
 554                 /* hand second half of page back to the ring */
 555                 ixgbevf_reuse_rx_page(rx_ring, rx_buffer);
 556         } else {
 557                 if (IS_ERR(skb))
 558                         /* We are not reusing the buffer so unmap it and free
 559                          * any references we are holding to it
 560                          */
 561                         dma_unmap_page_attrs(rx_ring->dev, rx_buffer->dma,
 562                                              ixgbevf_rx_pg_size(rx_ring),
 563                                              DMA_FROM_DEVICE,
 564                                              IXGBEVF_RX_DMA_ATTR);
 565                 __page_frag_cache_drain(rx_buffer->page,
 566                                         rx_buffer->pagecnt_bias);
 567         }
 568
 569         /* clear contents of rx_buffer */
 570         rx_buffer->page = NULL;
 571 }
 572
 573 /**
 574  * ixgbevf_is_non_eop - process handling of non-EOP buffers
 575  * @rx_ring: Rx ring being processed
 576  * @rx_desc: Rx descriptor for current buffer
 577  *
 578  * This function updates next to clean.  If the buffer is an EOP buffer
 579  * this function exits returning false, otherwise it will place the
 580  * sk_buff in the next buffer to be chained and return true indicating
 581  * that this is in fact a non-EOP buffer.
 582  **/
 583 static bool ixgbevf_is_non_eop(struct ixgbevf_ring *rx_ring,
 584                                union ixgbe_adv_rx_desc *rx_desc)
 585 {
 586         u32 ntc = rx_ring->next_to_clean + 1;
 587
 588         /* fetch, update, and store next to clean */
 589         ntc = (ntc < rx_ring->count) ? ntc : 0;
 590         rx_ring->next_to_clean = ntc;
 591
 592         prefetch(IXGBEVF_RX_DESC(rx_ring, ntc));
 593
 594         if (likely(ixgbevf_test_staterr(rx_desc, IXGBE_RXD_STAT_EOP)))
 595                 return false;
 596
 597         return true;
 598 }
 599
 600 static inline unsigned int ixgbevf_rx_offset(struct ixgbevf_ring *rx_ring)
 601 {
 602         return ring_uses_build_skb(rx_ring) ? IXGBEVF_SKB_PAD : 0;
 603 }
 604
 605 static bool ixgbevf_alloc_mapped_page(struct ixgbevf_ring *rx_ring,
 606                                       struct ixgbevf_rx_buffer *bi)
 607 {
 608         struct page *page = bi->page;
 609         dma_addr_t dma;
 610
 611         /* since we are recycling buffers we should seldom need to alloc */
 612         if (likely(page))
 613                 return true;
 614
 615         /* alloc new page for storage */
 616         page = dev_alloc_pages(ixgbevf_rx_pg_order(rx_ring));
 617         if (unlikely(!page)) {
 618                 rx_ring->rx_stats.alloc_rx_page_failed++;
 619                 return false;
 620         }
 621
 622         /* map page for use */
 623         dma = dma_map_page_attrs(rx_ring->dev, page, 0,
 624                                  ixgbevf_rx_pg_size(rx_ring),
 625                                  DMA_FROM_DEVICE, IXGBEVF_RX_DMA_ATTR);
 626
 627         /* if mapping failed free memory back to system since
 628          * there isn't much point in holding memory we can't use
 629          */
 630         if (dma_mapping_error(rx_ring->dev, dma)) {
 631                 __free_pages(page, ixgbevf_rx_pg_order(rx_ring));
 632
 633                 rx_ring->rx_stats.alloc_rx_page_failed++;
 634                 return false;
 635         }
 636
 637         bi->dma = dma;
 638         bi->page = page;
 639         bi->page_offset = ixgbevf_rx_offset(rx_ring);
 640         bi->pagecnt_bias = 1;
 641         rx_ring->rx_stats.alloc_rx_page++;
 642
 643         return true;
 644 }
 645
 646 /**
 647  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 648  * @rx_ring: rx descriptor ring (for a specific queue) to setup buffers on
 649  * @cleaned_count: number of buffers to replace
 650  **/
 651 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_ring *rx_ring,
 652                                      u16 cleaned_count)
 653 {
 654         union ixgbe_adv_rx_desc *rx_desc;
 655         struct ixgbevf_rx_buffer *bi;
 656         unsigned int i = rx_ring->next_to_use;
 657
 658         /* nothing to do or no valid netdev defined */
 659         if (!cleaned_count || !rx_ring->netdev)
 660                 return;
 661
 662         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 663         bi = &rx_ring->rx_buffer_info[i];
 664         i -= rx_ring->count;
 665
 666         do {
 667                 if (!ixgbevf_alloc_mapped_page(rx_ring, bi))
 668                         break;
 669
 670                 /* sync the buffer for use by the device */
 671                 dma_sync_single_range_for_device(rx_ring->dev, bi->dma,
 672                                                  bi->page_offset,
 673                                                  ixgbevf_rx_bufsz(rx_ring),
 674                                                  DMA_FROM_DEVICE);
 675
 676                 /* Refresh the desc even if pkt_addr didn't change
 677                  * because each write-back erases this info.
 678                  */
 679                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma + bi->page_offset);
 680
 681                 rx_desc++;
 682                 bi++;
 683                 i++;
 684                 if (unlikely(!i)) {
 685                         rx_desc = IXGBEVF_RX_DESC(rx_ring, 0);
 686                         bi = rx_ring->rx_buffer_info;
 687                         i -= rx_ring->count;
 688                 }
 689
 690                 /* clear the length for the next_to_use descriptor */
 691                 rx_desc->wb.upper.length = 0;
 692
 693                 cleaned_count--;
 694         } while (cleaned_count);
 695
 696         i += rx_ring->count;
 697
 698         if (rx_ring->next_to_use != i) {
 699                 /* record the next descriptor to use */
 700                 rx_ring->next_to_use = i;
 701
 702                 /* update next to alloc since we have filled the ring */
 703                 rx_ring->next_to_alloc = i;
 704
 705                 /* Force memory writes to complete before letting h/w
 706                  * know there are new descriptors to fetch.  (Only
 707                  * applicable for weak-ordered memory model archs,
 708                  * such as IA-64).
 709                  */
 710                 wmb();
 711                 ixgbevf_write_tail(rx_ring, i);
 712         }
 713 }
 714
 715 /**
 716  * ixgbevf_cleanup_headers - Correct corrupted or empty headers
 717  * @rx_ring: rx descriptor ring packet is being transacted on
 718  * @rx_desc: pointer to the EOP Rx descriptor
 719  * @skb: pointer to current skb being fixed
 720  *
 721  * Check for corrupted packet headers caused by senders on the local L2
 722  * embedded NIC switch not setting up their Tx Descriptors right.  These
 723  * should be very rare.
 724  *
 725  * Also address the case where we are pulling data in on pages only
 726  * and as such no data is present in the skb header.
 727  *
 728  * In addition if skb is not at least 60 bytes we need to pad it so that
 729  * it is large enough to qualify as a valid Ethernet frame.
 730  *
 731  * Returns true if an error was encountered and skb was freed.
 732  **/
 733 static bool ixgbevf_cleanup_headers(struct ixgbevf_ring *rx_ring,
 734                                     union ixgbe_adv_rx_desc *rx_desc,
 735                                     struct sk_buff *skb)
 736 {
 737         /* XDP packets use error pointer so abort at this point */
 738         if (IS_ERR(skb))
 739                 return true;
 740
 741         /* verify that the packet does not have any known errors */
 742         if (unlikely(ixgbevf_test_staterr(rx_desc,
 743                                           IXGBE_RXDADV_ERR_FRAME_ERR_MASK))) {
 744                 struct net_device *netdev = rx_ring->netdev;
 745
 746                 if (!(netdev->features & NETIF_F_RXALL)) {
 747                         dev_kfree_skb_any(skb);
 748                         return true;
 749                 }
 750         }
 751
 752         /* if eth_skb_pad returns an error the skb was freed */
 753         if (eth_skb_pad(skb))
 754                 return true;
 755
 756         return false;
 757 }
 758
 759 /**
 760  * ixgbevf_reuse_rx_page - page flip buffer and store it back on the ring
 761  * @rx_ring: rx descriptor ring to store buffers on
 762  * @old_buff: donor buffer to have page reused
 763  *
 764  * Synchronizes page for reuse by the adapter
 765  **/
 766 static void ixgbevf_reuse_rx_page(struct ixgbevf_ring *rx_ring,
 767                                   struct ixgbevf_rx_buffer *old_buff)
 768 {
 769         struct ixgbevf_rx_buffer *new_buff;
 770         u16 nta = rx_ring->next_to_alloc;
 771
 772         new_buff = &rx_ring->rx_buffer_info[nta];
 773
 774         /* update, and store next to alloc */
 775         nta++;
 776         rx_ring->next_to_alloc = (nta < rx_ring->count) ? nta : 0;
 777
 778         /* transfer page from old buffer to new buffer */
 779         new_buff->page = old_buff->page;
 780         new_buff->dma = old_buff->dma;
 781         new_buff->page_offset = old_buff->page_offset;
 782         new_buff->pagecnt_bias = old_buff->pagecnt_bias;
 783 }
 784
 785 static inline bool ixgbevf_page_is_reserved(struct page *page)
 786 {
 787         return (page_to_nid(page) != numa_mem_id()) || page_is_pfmemalloc(page);
 788 }
 789
 790 static bool ixgbevf_can_reuse_rx_page(struct ixgbevf_rx_buffer *rx_buffer)
 791 {
 792         unsigned int pagecnt_bias = rx_buffer->pagecnt_bias;
 793         struct page *page = rx_buffer->page;
 794
 795         /* avoid re-using remote pages */
 796         if (unlikely(ixgbevf_page_is_reserved(page)))
 797                 return false;
 798
 799 #if (PAGE_SIZE < 8192)
 800         /* if we are only owner of page we can reuse it */
 801         if (unlikely((page_ref_count(page) - pagecnt_bias) > 1))
 802                 return false;
 803 #else
 804 #define IXGBEVF_LAST_OFFSET \
 805         (SKB_WITH_OVERHEAD(PAGE_SIZE) - IXGBEVF_RXBUFFER_2048)
 806
 807         if (rx_buffer->page_offset > IXGBEVF_LAST_OFFSET)
 808                 return false;
 809
 810 #endif
 811
 812         /* If we have drained the page fragment pool we need to update
 813          * the pagecnt_bias and page count so that we fully restock the
 814          * number of references the driver holds.
 815          */
 816         if (unlikely(!pagecnt_bias)) {
 817                 page_ref_add(page, USHRT_MAX);
 818                 rx_buffer->pagecnt_bias = USHRT_MAX;
 819         }
 820
 821         return true;
 822 }
 823
 824 /**
 825  * ixgbevf_add_rx_frag - Add contents of Rx buffer to sk_buff
 826  * @rx_ring: rx descriptor ring to transact packets on
 827  * @rx_buffer: buffer containing page to add
 828  * @skb: sk_buff to place the data into
 829  * @size: size of buffer to be added
 830  *
 831  * This function will add the data contained in rx_buffer->page to the skb.
 832  **/
 833 static void ixgbevf_add_rx_frag(struct ixgbevf_ring *rx_ring,
 834                                 struct ixgbevf_rx_buffer *rx_buffer,
 835                                 struct sk_buff *skb,
 836                                 unsigned int size)
 837 {
 838 #if (PAGE_SIZE < 8192)
 839         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
 840 #else
 841         unsigned int truesize = ring_uses_build_skb(rx_ring) ?
 842                                 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
 843                                 SKB_DATA_ALIGN(size);
 844 #endif
 845         skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_buffer->page,
 846                         rx_buffer->page_offset, size, truesize);
 847 #if (PAGE_SIZE < 8192)
 848         rx_buffer->page_offset ^= truesize;
 849 #else
 850         rx_buffer->page_offset += truesize;
 851 #endif
 852 }
 853
 854 static
 855 struct sk_buff *ixgbevf_construct_skb(struct ixgbevf_ring *rx_ring,
 856                                       struct ixgbevf_rx_buffer *rx_buffer,
 857                                       struct xdp_buff *xdp,
 858                                       union ixgbe_adv_rx_desc *rx_desc)
 859 {
 860         unsigned int size = xdp->data_end - xdp->data;
 861 #if (PAGE_SIZE < 8192)
 862         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
 863 #else
 864         unsigned int truesize = SKB_DATA_ALIGN(xdp->data_end -
 865                                                xdp->data_hard_start);
 866 #endif
 867         unsigned int headlen;
 868         struct sk_buff *skb;
 869
 870         /* prefetch first cache line of first page */
 871         prefetch(xdp->data);
 872 #if L1_CACHE_BYTES < 128
 873         prefetch(xdp->data + L1_CACHE_BYTES);
 874 #endif
 875         /* Note, we get here by enabling legacy-rx via:
 876          *
 877          *    ethtool --set-priv-flags <dev> legacy-rx on
 878          *
 879          * In this mode, we currently get 0 extra XDP headroom as
 880          * opposed to having legacy-rx off, where we process XDP
 881          * packets going to stack via ixgbevf_build_skb().
 882          *
 883          * For ixgbevf_construct_skb() mode it means that the
 884          * xdp->data_meta will always point to xdp->data, since
 885          * the helper cannot expand the head. Should this ever
 886          * changed in future for legacy-rx mode on, then lets also
 887          * add xdp->data_meta handling here.
 888          */
 889
 890         /* allocate a skb to store the frags */
 891         skb = napi_alloc_skb(&rx_ring->q_vector->napi, IXGBEVF_RX_HDR_SIZE);
 892         if (unlikely(!skb))
 893                 return NULL;
 894
 895         /* Determine available headroom for copy */
 896         headlen = size;
 897         if (headlen > IXGBEVF_RX_HDR_SIZE)
 898                 headlen = eth_get_headlen(xdp->data, IXGBEVF_RX_HDR_SIZE);
 899
 900         /* align pull length to size of long to optimize memcpy performance */
 901         memcpy(__skb_put(skb, headlen), xdp->data,
 902                ALIGN(headlen, sizeof(long)));
 903
 904         /* update all of the pointers */
 905         size -= headlen;
 906         if (size) {
 907                 skb_add_rx_frag(skb, 0, rx_buffer->page,
 908                                 (xdp->data + headlen) -
 909                                         page_address(rx_buffer->page),
 910                                 size, truesize);
 911 #if (PAGE_SIZE < 8192)
 912                 rx_buffer->page_offset ^= truesize;
 913 #else
 914                 rx_buffer->page_offset += truesize;
 915 #endif
 916         } else {
 917                 rx_buffer->pagecnt_bias++;
 918         }
 919
 920         return skb;
 921 }
 922
 923 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 924                                              u32 qmask)
 925 {
 926         struct ixgbe_hw *hw = &adapter->hw;
 927
 928         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 929 }
 930
 931 static struct sk_buff *ixgbevf_build_skb(struct ixgbevf_ring *rx_ring,
 932                                          struct ixgbevf_rx_buffer *rx_buffer,
 933                                          struct xdp_buff *xdp,
 934                                          union ixgbe_adv_rx_desc *rx_desc)
 935 {
 936         unsigned int metasize = xdp->data - xdp->data_meta;
 937 #if (PAGE_SIZE < 8192)
 938         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
 939 #else
 940         unsigned int truesize = SKB_DATA_ALIGN(sizeof(struct skb_shared_info)) +
 941                                 SKB_DATA_ALIGN(xdp->data_end -
 942                                                xdp->data_hard_start);
 943 #endif
 944         struct sk_buff *skb;
 945
 946         /* Prefetch first cache line of first page. If xdp->data_meta
 947          * is unused, this points to xdp->data, otherwise, we likely
 948          * have a consumer accessing first few bytes of meta data,
 949          * and then actual data.
 950          */
 951         prefetch(xdp->data_meta);
 952 #if L1_CACHE_BYTES < 128
 953         prefetch(xdp->data_meta + L1_CACHE_BYTES);
 954 #endif
 955
 956         /* build an skb around the page buffer */
 957         skb = build_skb(xdp->data_hard_start, truesize);
 958         if (unlikely(!skb))
 959                 return NULL;
 960
 961         /* update pointers within the skb to store the data */
 962         skb_reserve(skb, xdp->data - xdp->data_hard_start);
 963         __skb_put(skb, xdp->data_end - xdp->data);
 964         if (metasize)
 965                 skb_metadata_set(skb, metasize);
 966
 967         /* update buffer offset */
 968 #if (PAGE_SIZE < 8192)
 969         rx_buffer->page_offset ^= truesize;
 970 #else
 971         rx_buffer->page_offset += truesize;
 972 #endif
 973
 974         return skb;
 975 }
 976
 977 #define IXGBEVF_XDP_PASS 0
 978 #define IXGBEVF_XDP_CONSUMED 1
 979 #define IXGBEVF_XDP_TX 2
 980
 981 static int ixgbevf_xmit_xdp_ring(struct ixgbevf_ring *ring,
 982                                  struct xdp_buff *xdp)
 983 {
 984         struct ixgbevf_tx_buffer *tx_buffer;
 985         union ixgbe_adv_tx_desc *tx_desc;
 986         u32 len, cmd_type;
 987         dma_addr_t dma;
 988         u16 i;
 989
 990         len = xdp->data_end - xdp->data;
 991
 992         if (unlikely(!ixgbevf_desc_unused(ring)))
 993                 return IXGBEVF_XDP_CONSUMED;
 994
 995         dma = dma_map_single(ring->dev, xdp->data, len, DMA_TO_DEVICE);
 996         if (dma_mapping_error(ring->dev, dma))
 997                 return IXGBEVF_XDP_CONSUMED;
 998
 999         /* record the location of the first descriptor for this packet */
1000         i = ring->next_to_use;
1001         tx_buffer = &ring->tx_buffer_info[i];
1002
1003         dma_unmap_len_set(tx_buffer, len, len);
1004         dma_unmap_addr_set(tx_buffer, dma, dma);
1005         tx_buffer->data = xdp->data;
1006         tx_buffer->bytecount = len;
1007         tx_buffer->gso_segs = 1;
1008         tx_buffer->protocol = 0;
1009
1010         /* Populate minimal context descriptor that will provide for the
1011          * fact that we are expected to process Ethernet frames.
1012          */
1013         if (!test_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state)) {
1014                 struct ixgbe_adv_tx_context_desc *context_desc;
1015
1016                 set_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1017
1018                 context_desc = IXGBEVF_TX_CTXTDESC(ring, 0);
1019                 context_desc->vlan_macip_lens   =
1020                         cpu_to_le32(ETH_HLEN << IXGBE_ADVTXD_MACLEN_SHIFT);
1021                 context_desc->fceof_saidx       = 0;
1022                 context_desc->type_tucmd_mlhl   =
1023                         cpu_to_le32(IXGBE_TXD_CMD_DEXT |
1024                                     IXGBE_ADVTXD_DTYP_CTXT);
1025                 context_desc->mss_l4len_idx     = 0;
1026
1027                 i = 1;
1028         }
1029
1030         /* put descriptor type bits */
1031         cmd_type = IXGBE_ADVTXD_DTYP_DATA |
1032                    IXGBE_ADVTXD_DCMD_DEXT |
1033                    IXGBE_ADVTXD_DCMD_IFCS;
1034         cmd_type |= len | IXGBE_TXD_CMD;
1035
1036         tx_desc = IXGBEVF_TX_DESC(ring, i);
1037         tx_desc->read.buffer_addr = cpu_to_le64(dma);
1038
1039         tx_desc->read.cmd_type_len = cpu_to_le32(cmd_type);
1040         tx_desc->read.olinfo_status =
1041                         cpu_to_le32((len << IXGBE_ADVTXD_PAYLEN_SHIFT) |
1042                                     IXGBE_ADVTXD_CC);
1043
1044         /* Avoid any potential race with cleanup */
1045         smp_wmb();
1046
1047         /* set next_to_watch value indicating a packet is present */
1048         i++;
1049         if (i == ring->count)
1050                 i = 0;
1051
1052         tx_buffer->next_to_watch = tx_desc;
1053         ring->next_to_use = i;
1054
1055         return IXGBEVF_XDP_TX;
1056 }
1057
1058 static struct sk_buff *ixgbevf_run_xdp(struct ixgbevf_adapter *adapter,
1059                                        struct ixgbevf_ring  *rx_ring,
1060                                        struct xdp_buff *xdp)
1061 {
1062         int result = IXGBEVF_XDP_PASS;
1063         struct ixgbevf_ring *xdp_ring;
1064         struct bpf_prog *xdp_prog;
1065         u32 act;
1066
1067         rcu_read_lock();
1068         xdp_prog = READ_ONCE(rx_ring->xdp_prog);
1069
1070         if (!xdp_prog)
1071                 goto xdp_out;
1072
1073         act = bpf_prog_run_xdp(xdp_prog, xdp);
1074         switch (act) {
1075         case XDP_PASS:
1076                 break;
1077         case XDP_TX:
1078                 xdp_ring = adapter->xdp_ring[rx_ring->queue_index];
1079                 result = ixgbevf_xmit_xdp_ring(xdp_ring, xdp);
1080                 break;
1081         default:
1082                 bpf_warn_invalid_xdp_action(act);
1083                 /* fallthrough */
1084         case XDP_ABORTED:
1085                 trace_xdp_exception(rx_ring->netdev, xdp_prog, act);
1086                 /* fallthrough -- handle aborts by dropping packet */
1087         case XDP_DROP:
1088                 result = IXGBEVF_XDP_CONSUMED;
1089                 break;
1090         }
1091 xdp_out:
1092         rcu_read_unlock();
1093         return ERR_PTR(-result);
1094 }
1095
1096 static void ixgbevf_rx_buffer_flip(struct ixgbevf_ring *rx_ring,
1097                                    struct ixgbevf_rx_buffer *rx_buffer,
1098                                    unsigned int size)
1099 {
1100 #if (PAGE_SIZE < 8192)
1101         unsigned int truesize = ixgbevf_rx_pg_size(rx_ring) / 2;
1102
1103         rx_buffer->page_offset ^= truesize;
1104 #else
1105         unsigned int truesize = ring_uses_build_skb(rx_ring) ?
1106                                 SKB_DATA_ALIGN(IXGBEVF_SKB_PAD + size) :
1107                                 SKB_DATA_ALIGN(size);
1108
1109         rx_buffer->page_offset += truesize;
1110 #endif
1111 }
1112
1113 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
1114                                 struct ixgbevf_ring *rx_ring,
1115                                 int budget)
1116 {
1117         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1118         struct ixgbevf_adapter *adapter = q_vector->adapter;
1119         u16 cleaned_count = ixgbevf_desc_unused(rx_ring);
1120         struct sk_buff *skb = rx_ring->skb;
1121         bool xdp_xmit = false;
1122         struct xdp_buff xdp;
1123
1124         xdp.rxq = &rx_ring->xdp_rxq;
1125
1126         while (likely(total_rx_packets < budget)) {
1127                 struct ixgbevf_rx_buffer *rx_buffer;
1128                 union ixgbe_adv_rx_desc *rx_desc;
1129                 unsigned int size;
1130
1131                 /* return some buffers to hardware, one at a time is too slow */
1132                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
1133                         ixgbevf_alloc_rx_buffers(rx_ring, cleaned_count);
1134                         cleaned_count = 0;
1135                 }
1136
1137                 rx_desc = IXGBEVF_RX_DESC(rx_ring, rx_ring->next_to_clean);
1138                 size = le16_to_cpu(rx_desc->wb.upper.length);
1139                 if (!size)
1140                         break;
1141
1142                 /* This memory barrier is needed to keep us from reading
1143                  * any other fields out of the rx_desc until we know the
1144                  * RXD_STAT_DD bit is set
1145                  */
1146                 rmb();
1147
1148                 rx_buffer = ixgbevf_get_rx_buffer(rx_ring, size);
1149
1150                 /* retrieve a buffer from the ring */
1151                 if (!skb) {
1152                         xdp.data = page_address(rx_buffer->page) +
1153                                    rx_buffer->page_offset;
1154                         xdp.data_meta = xdp.data;
1155                         xdp.data_hard_start = xdp.data -
1156                                               ixgbevf_rx_offset(rx_ring);
1157                         xdp.data_end = xdp.data + size;
1158
1159                         skb = ixgbevf_run_xdp(adapter, rx_ring, &xdp);
1160                 }
1161
1162                 if (IS_ERR(skb)) {
1163                         if (PTR_ERR(skb) == -IXGBEVF_XDP_TX) {
1164                                 xdp_xmit = true;
1165                                 ixgbevf_rx_buffer_flip(rx_ring, rx_buffer,
1166                                                        size);
1167                         } else {
1168                                 rx_buffer->pagecnt_bias++;
1169                         }
1170                         total_rx_packets++;
1171                         total_rx_bytes += size;
1172                 } else if (skb) {
1173                         ixgbevf_add_rx_frag(rx_ring, rx_buffer, skb, size);
1174                 } else if (ring_uses_build_skb(rx_ring)) {
1175                         skb = ixgbevf_build_skb(rx_ring, rx_buffer,
1176                                                 &xdp, rx_desc);
1177                 } else {
1178                         skb = ixgbevf_construct_skb(rx_ring, rx_buffer,
1179                                                     &xdp, rx_desc);
1180                 }
1181
1182                 /* exit if we failed to retrieve a buffer */
1183                 if (!skb) {
1184                         rx_ring->rx_stats.alloc_rx_buff_failed++;
1185                         rx_buffer->pagecnt_bias++;
1186                         break;
1187                 }
1188
1189                 ixgbevf_put_rx_buffer(rx_ring, rx_buffer, skb);
1190                 cleaned_count++;
1191
1192                 /* fetch next buffer in frame if non-eop */
1193                 if (ixgbevf_is_non_eop(rx_ring, rx_desc))
1194                         continue;
1195
1196                 /* verify the packet layout is correct */
1197                 if (ixgbevf_cleanup_headers(rx_ring, rx_desc, skb)) {
1198                         skb = NULL;
1199                         continue;
1200                 }
1201
1202                 /* probably a little skewed due to removing CRC */
1203                 total_rx_bytes += skb->len;
1204
1205                 /* Workaround hardware that can't do proper VEPA multicast
1206                  * source pruning.
1207                  */
1208                 if ((skb->pkt_type == PACKET_BROADCAST ||
1209                      skb->pkt_type == PACKET_MULTICAST) &&
1210                     ether_addr_equal(rx_ring->netdev->dev_addr,
1211                                      eth_hdr(skb)->h_source)) {
1212                         dev_kfree_skb_irq(skb);
1213                         continue;
1214                 }
1215
1216                 /* populate checksum, VLAN, and protocol */
1217                 ixgbevf_process_skb_fields(rx_ring, rx_desc, skb);
1218
1219                 ixgbevf_rx_skb(q_vector, skb);
1220
1221                 /* reset skb pointer */
1222                 skb = NULL;
1223
1224                 /* update budget accounting */
1225                 total_rx_packets++;
1226         }
1227
1228         /* place incomplete frames back on ring for completion */
1229         rx_ring->skb = skb;
1230
1231         if (xdp_xmit) {
1232                 struct ixgbevf_ring *xdp_ring =
1233                         adapter->xdp_ring[rx_ring->queue_index];
1234
1235                 /* Force memory writes to complete before letting h/w
1236                  * know there are new descriptors to fetch.
1237                  */
1238                 wmb();
1239                 ixgbevf_write_tail(xdp_ring, xdp_ring->next_to_use);
1240         }
1241
1242         u64_stats_update_begin(&rx_ring->syncp);
1243         rx_ring->stats.packets += total_rx_packets;
1244         rx_ring->stats.bytes += total_rx_bytes;
1245         u64_stats_update_end(&rx_ring->syncp);
1246         q_vector->rx.total_packets += total_rx_packets;
1247         q_vector->rx.total_bytes += total_rx_bytes;
1248
1249         return total_rx_packets;
1250 }
1251
1252 /**
1253  * ixgbevf_poll - NAPI polling calback
1254  * @napi: napi struct with our devices info in it
1255  * @budget: amount of work driver is allowed to do this pass, in packets
1256  *
1257  * This function will clean more than one or more rings associated with a
1258  * q_vector.
1259  **/
1260 static int ixgbevf_poll(struct napi_struct *napi, int budget)
1261 {
1262         struct ixgbevf_q_vector *q_vector =
1263                 container_of(napi, struct ixgbevf_q_vector, napi);
1264         struct ixgbevf_adapter *adapter = q_vector->adapter;
1265         struct ixgbevf_ring *ring;
1266         int per_ring_budget, work_done = 0;
1267         bool clean_complete = true;
1268
1269         ixgbevf_for_each_ring(ring, q_vector->tx) {
1270                 if (!ixgbevf_clean_tx_irq(q_vector, ring, budget))
1271                         clean_complete = false;
1272         }
1273
1274         if (budget <= 0)
1275                 return budget;
1276
1277         /* attempt to distribute budget to each queue fairly, but don't allow
1278          * the budget to go below 1 because we'll exit polling
1279          */
1280         if (q_vector->rx.count > 1)
1281                 per_ring_budget = max(budget/q_vector->rx.count, 1);
1282         else
1283                 per_ring_budget = budget;
1284
1285         ixgbevf_for_each_ring(ring, q_vector->rx) {
1286                 int cleaned = ixgbevf_clean_rx_irq(q_vector, ring,
1287                                                    per_ring_budget);
1288                 work_done += cleaned;
1289                 if (cleaned >= per_ring_budget)
1290                         clean_complete = false;
1291         }
1292
1293         /* If all work not completed, return budget and keep polling */
1294         if (!clean_complete)
1295                 return budget;
1296         /* all work done, exit the polling mode */
1297         napi_complete_done(napi, work_done);
1298         if (adapter->rx_itr_setting == 1)
1299                 ixgbevf_set_itr(q_vector);
1300         if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
1301             !test_bit(__IXGBEVF_REMOVING, &adapter->state))
1302                 ixgbevf_irq_enable_queues(adapter,
1303                                           BIT(q_vector->v_idx));
1304
1305         return 0;
1306 }
1307
1308 /**
1309  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
1310  * @q_vector: structure containing interrupt and ring information
1311  **/
1312 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
1313 {
1314         struct ixgbevf_adapter *adapter = q_vector->adapter;
1315         struct ixgbe_hw *hw = &adapter->hw;
1316         int v_idx = q_vector->v_idx;
1317         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
1318
1319         /* set the WDIS bit to not clear the timer bits and cause an
1320          * immediate assertion of the interrupt
1321          */
1322         itr_reg |= IXGBE_EITR_CNT_WDIS;
1323
1324         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
1325 }
1326
1327 /**
1328  * ixgbevf_configure_msix - Configure MSI-X hardware
1329  * @adapter: board private structure
1330  *
1331  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
1332  * interrupts.
1333  **/
1334 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
1335 {
1336         struct ixgbevf_q_vector *q_vector;
1337         int q_vectors, v_idx;
1338
1339         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1340         adapter->eims_enable_mask = 0;
1341
1342         /* Populate the IVAR table and set the ITR values to the
1343          * corresponding register.
1344          */
1345         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1346                 struct ixgbevf_ring *ring;
1347
1348                 q_vector = adapter->q_vector[v_idx];
1349
1350                 ixgbevf_for_each_ring(ring, q_vector->rx)
1351                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1352
1353                 ixgbevf_for_each_ring(ring, q_vector->tx)
1354                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1355
1356                 if (q_vector->tx.ring && !q_vector->rx.ring) {
1357                         /* Tx only vector */
1358                         if (adapter->tx_itr_setting == 1)
1359                                 q_vector->itr = IXGBE_12K_ITR;
1360                         else
1361                                 q_vector->itr = adapter->tx_itr_setting;
1362                 } else {
1363                         /* Rx or Rx/Tx vector */
1364                         if (adapter->rx_itr_setting == 1)
1365                                 q_vector->itr = IXGBE_20K_ITR;
1366                         else
1367                                 q_vector->itr = adapter->rx_itr_setting;
1368                 }
1369
1370                 /* add q_vector eims value to global eims_enable_mask */
1371                 adapter->eims_enable_mask |= BIT(v_idx);
1372
1373                 ixgbevf_write_eitr(q_vector);
1374         }
1375
1376         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
1377         /* setup eims_other and add value to global eims_enable_mask */
1378         adapter->eims_other = BIT(v_idx);
1379         adapter->eims_enable_mask |= adapter->eims_other;
1380 }
1381
1382 enum latency_range {
1383         lowest_latency = 0,
1384         low_latency = 1,
1385         bulk_latency = 2,
1386         latency_invalid = 255
1387 };
1388
1389 /**
1390  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
1391  * @q_vector: structure containing interrupt and ring information
1392  * @ring_container: structure containing ring performance data
1393  *
1394  * Stores a new ITR value based on packets and byte
1395  * counts during the last interrupt.  The advantage of per interrupt
1396  * computation is faster updates and more accurate ITR for the current
1397  * traffic pattern.  Constants in this function were computed
1398  * based on theoretical maximum wire speed and thresholds were set based
1399  * on testing data as well as attempting to minimize response time
1400  * while increasing bulk throughput.
1401  **/
1402 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
1403                                struct ixgbevf_ring_container *ring_container)
1404 {
1405         int bytes = ring_container->total_bytes;
1406         int packets = ring_container->total_packets;
1407         u32 timepassed_us;
1408         u64 bytes_perint;
1409         u8 itr_setting = ring_container->itr;
1410
1411         if (packets == 0)
1412                 return;
1413
1414         /* simple throttle rate management
1415          *    0-20MB/s lowest (100000 ints/s)
1416          *   20-100MB/s low   (20000 ints/s)
1417          *  100-1249MB/s bulk (12000 ints/s)
1418          */
1419         /* what was last interrupt timeslice? */
1420         timepassed_us = q_vector->itr >> 2;
1421         bytes_perint = bytes / timepassed_us; /* bytes/usec */
1422
1423         switch (itr_setting) {
1424         case lowest_latency:
1425                 if (bytes_perint > 10)
1426                         itr_setting = low_latency;
1427                 break;
1428         case low_latency:
1429                 if (bytes_perint > 20)
1430                         itr_setting = bulk_latency;
1431                 else if (bytes_perint <= 10)
1432                         itr_setting = lowest_latency;
1433                 break;
1434         case bulk_latency:
1435                 if (bytes_perint <= 20)
1436                         itr_setting = low_latency;
1437                 break;
1438         }
1439
1440         /* clear work counters since we have the values we need */
1441         ring_container->total_bytes = 0;
1442         ring_container->total_packets = 0;
1443
1444         /* write updated itr to ring container */
1445         ring_container->itr = itr_setting;
1446 }
1447
1448 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
1449 {
1450         u32 new_itr = q_vector->itr;
1451         u8 current_itr;
1452
1453         ixgbevf_update_itr(q_vector, &q_vector->tx);
1454         ixgbevf_update_itr(q_vector, &q_vector->rx);
1455
1456         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1457
1458         switch (current_itr) {
1459         /* counts and packets in update_itr are dependent on these numbers */
1460         case lowest_latency:
1461                 new_itr = IXGBE_100K_ITR;
1462                 break;
1463         case low_latency:
1464                 new_itr = IXGBE_20K_ITR;
1465                 break;
1466         case bulk_latency:
1467                 new_itr = IXGBE_12K_ITR;
1468                 break;
1469         default:
1470                 break;
1471         }
1472
1473         if (new_itr != q_vector->itr) {
1474                 /* do an exponential smoothing */
1475                 new_itr = (10 * new_itr * q_vector->itr) /
1476                           ((9 * new_itr) + q_vector->itr);
1477
1478                 /* save the algorithm value here */
1479                 q_vector->itr = new_itr;
1480
1481                 ixgbevf_write_eitr(q_vector);
1482         }
1483 }
1484
1485 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
1486 {
1487         struct ixgbevf_adapter *adapter = data;
1488         struct ixgbe_hw *hw = &adapter->hw;
1489
1490         hw->mac.get_link_status = 1;
1491
1492         ixgbevf_service_event_schedule(adapter);
1493
1494         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
1495
1496         return IRQ_HANDLED;
1497 }
1498
1499 /**
1500  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
1501  * @irq: unused
1502  * @data: pointer to our q_vector struct for this interrupt vector
1503  **/
1504 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
1505 {
1506         struct ixgbevf_q_vector *q_vector = data;
1507
1508         /* EIAM disabled interrupts (on this vector) for us */
1509         if (q_vector->rx.ring || q_vector->tx.ring)
1510                 napi_schedule_irqoff(&q_vector->napi);
1511
1512         return IRQ_HANDLED;
1513 }
1514
1515 /**
1516  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1517  * @adapter: board private structure
1518  *
1519  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1520  * interrupts from the kernel.
1521  **/
1522 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1523 {
1524         struct net_device *netdev = adapter->netdev;
1525         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1526         unsigned int ri = 0, ti = 0;
1527         int vector, err;
1528
1529         for (vector = 0; vector < q_vectors; vector++) {
1530                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
1531                 struct msix_entry *entry = &adapter->msix_entries[vector];
1532
1533                 if (q_vector->tx.ring && q_vector->rx.ring) {
1534                         snprintf(q_vector->name, sizeof(q_vector->name),
1535                                  "%s-TxRx-%u", netdev->name, ri++);
1536                         ti++;
1537                 } else if (q_vector->rx.ring) {
1538                         snprintf(q_vector->name, sizeof(q_vector->name),
1539                                  "%s-rx-%u", netdev->name, ri++);
1540                 } else if (q_vector->tx.ring) {
1541                         snprintf(q_vector->name, sizeof(q_vector->name),
1542                                  "%s-tx-%u", netdev->name, ti++);
1543                 } else {
1544                         /* skip this unused q_vector */
1545                         continue;
1546                 }
1547                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
1548                                   q_vector->name, q_vector);
1549                 if (err) {
1550                         hw_dbg(&adapter->hw,
1551                                "request_irq failed for MSIX interrupt Error: %d\n",
1552                                err);
1553                         goto free_queue_irqs;
1554                 }
1555         }
1556
1557         err = request_irq(adapter->msix_entries[vector].vector,
1558                           &ixgbevf_msix_other, 0, netdev->name, adapter);
1559         if (err) {
1560                 hw_dbg(&adapter->hw, "request_irq for msix_other failed: %d\n",
1561                        err);
1562                 goto free_queue_irqs;
1563         }
1564
1565         return 0;
1566
1567 free_queue_irqs:
1568         while (vector) {
1569                 vector--;
1570                 free_irq(adapter->msix_entries[vector].vector,
1571                          adapter->q_vector[vector]);
1572         }
1573         /* This failure is non-recoverable - it indicates the system is
1574          * out of MSIX vector resources and the VF driver cannot run
1575          * without them.  Set the number of msix vectors to zero
1576          * indicating that not enough can be allocated.  The error
1577          * will be returned to the user indicating device open failed.
1578          * Any further attempts to force the driver to open will also
1579          * fail.  The only way to recover is to unload the driver and
1580          * reload it again.  If the system has recovered some MSIX
1581          * vectors then it may succeed.
1582          */
1583         adapter->num_msix_vectors = 0;
1584         return err;
1585 }
1586
1587 /**
1588  * ixgbevf_request_irq - initialize interrupts
1589  * @adapter: board private structure
1590  *
1591  * Attempts to configure interrupts using the best available
1592  * capabilities of the hardware and kernel.
1593  **/
1594 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1595 {
1596         int err = ixgbevf_request_msix_irqs(adapter);
1597
1598         if (err)
1599                 hw_dbg(&adapter->hw, "request_irq failed, Error %d\n", err);
1600
1601         return err;
1602 }
1603
1604 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1605 {
1606         int i, q_vectors;
1607
1608         if (!adapter->msix_entries)
1609                 return;
1610
1611         q_vectors = adapter->num_msix_vectors;
1612         i = q_vectors - 1;
1613
1614         free_irq(adapter->msix_entries[i].vector, adapter);
1615         i--;
1616
1617         for (; i >= 0; i--) {
1618                 /* free only the irqs that were actually requested */
1619                 if (!adapter->q_vector[i]->rx.ring &&
1620                     !adapter->q_vector[i]->tx.ring)
1621                         continue;
1622
1623                 free_irq(adapter->msix_entries[i].vector,
1624                          adapter->q_vector[i]);
1625         }
1626 }
1627
1628 /**
1629  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1630  * @adapter: board private structure
1631  **/
1632 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1633 {
1634         struct ixgbe_hw *hw = &adapter->hw;
1635         int i;
1636
1637         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1638         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1639         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1640
1641         IXGBE_WRITE_FLUSH(hw);
1642
1643         for (i = 0; i < adapter->num_msix_vectors; i++)
1644                 synchronize_irq(adapter->msix_entries[i].vector);
1645 }
1646
1647 /**
1648  * ixgbevf_irq_enable - Enable default interrupt generation settings
1649  * @adapter: board private structure
1650  **/
1651 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1652 {
1653         struct ixgbe_hw *hw = &adapter->hw;
1654
1655         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1656         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1657         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1658 }
1659
1660 /**
1661  * ixgbevf_configure_tx_ring - Configure 82599 VF Tx ring after Reset
1662  * @adapter: board private structure
1663  * @ring: structure containing ring specific data
1664  *
1665  * Configure the Tx descriptor ring after a reset.
1666  **/
1667 static void ixgbevf_configure_tx_ring(struct ixgbevf_adapter *adapter,
1668                                       struct ixgbevf_ring *ring)
1669 {
1670         struct ixgbe_hw *hw = &adapter->hw;
1671         u64 tdba = ring->dma;
1672         int wait_loop = 10;
1673         u32 txdctl = IXGBE_TXDCTL_ENABLE;
1674         u8 reg_idx = ring->reg_idx;
1675
1676         /* disable queue to avoid issues while updating state */
1677         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
1678         IXGBE_WRITE_FLUSH(hw);
1679
1680         IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(reg_idx), tdba & DMA_BIT_MASK(32));
1681         IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(reg_idx), tdba >> 32);
1682         IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(reg_idx),
1683                         ring->count * sizeof(union ixgbe_adv_tx_desc));
1684
1685         /* disable head writeback */
1686         IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAH(reg_idx), 0);
1687         IXGBE_WRITE_REG(hw, IXGBE_VFTDWBAL(reg_idx), 0);
1688
1689         /* enable relaxed ordering */
1690         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(reg_idx),
1691                         (IXGBE_DCA_TXCTRL_DESC_RRO_EN |
1692                          IXGBE_DCA_TXCTRL_DATA_RRO_EN));
1693
1694         /* reset head and tail pointers */
1695         IXGBE_WRITE_REG(hw, IXGBE_VFTDH(reg_idx), 0);
1696         IXGBE_WRITE_REG(hw, IXGBE_VFTDT(reg_idx), 0);
1697         ring->tail = adapter->io_addr + IXGBE_VFTDT(reg_idx);
1698
1699         /* reset ntu and ntc to place SW in sync with hardwdare */
1700         ring->next_to_clean = 0;
1701         ring->next_to_use = 0;
1702
1703         /* In order to avoid issues WTHRESH + PTHRESH should always be equal
1704          * to or less than the number of on chip descriptors, which is
1705          * currently 40.
1706          */
1707         txdctl |= (8 << 16);    /* WTHRESH = 8 */
1708
1709         /* Setting PTHRESH to 32 both improves performance */
1710         txdctl |= (1u << 8) |    /* HTHRESH = 1 */
1711                    32;           /* PTHRESH = 32 */
1712
1713         /* reinitialize tx_buffer_info */
1714         memset(ring->tx_buffer_info, 0,
1715                sizeof(struct ixgbevf_tx_buffer) * ring->count);
1716
1717         clear_bit(__IXGBEVF_HANG_CHECK_ARMED, &ring->state);
1718         clear_bit(__IXGBEVF_TX_XDP_RING_PRIMED, &ring->state);
1719
1720         IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx), txdctl);
1721
1722         /* poll to verify queue is enabled */
1723         do {
1724                 usleep_range(1000, 2000);
1725                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(reg_idx));
1726         }  while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
1727         if (!wait_loop)
1728                 hw_dbg(hw, "Could not enable Tx Queue %d\n", reg_idx);
1729 }
1730
1731 /**
1732  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1733  * @adapter: board private structure
1734  *
1735  * Configure the Tx unit of the MAC after a reset.
1736  **/
1737 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1738 {
1739         u32 i;
1740
1741         /* Setup the HW Tx Head and Tail descriptor pointers */
1742         for (i = 0; i < adapter->num_tx_queues; i++)
1743                 ixgbevf_configure_tx_ring(adapter, adapter->tx_ring[i]);
1744         for (i = 0; i < adapter->num_xdp_queues; i++)
1745                 ixgbevf_configure_tx_ring(adapter, adapter->xdp_ring[i]);
1746 }
1747
1748 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1749
1750 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter,
1751                                      struct ixgbevf_ring *ring, int index)
1752 {
1753         struct ixgbe_hw *hw = &adapter->hw;
1754         u32 srrctl;
1755
1756         srrctl = IXGBE_SRRCTL_DROP_EN;
1757
1758         srrctl |= IXGBEVF_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT;
1759         if (ring_uses_large_buffer(ring))
1760                 srrctl |= IXGBEVF_RXBUFFER_3072 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1761         else
1762                 srrctl |= IXGBEVF_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1763         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1764
1765         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1766 }
1767
1768 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1769 {
1770         struct ixgbe_hw *hw = &adapter->hw;
1771
1772         /* PSRTYPE must be initialized in 82599 */
1773         u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1774                       IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1775                       IXGBE_PSRTYPE_L2HDR;
1776
1777         if (adapter->num_rx_queues > 1)
1778                 psrtype |= BIT(29);
1779
1780         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1781 }
1782
1783 #define IXGBEVF_MAX_RX_DESC_POLL 10
1784 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1785                                      struct ixgbevf_ring *ring)
1786 {
1787         struct ixgbe_hw *hw = &adapter->hw;
1788         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1789         u32 rxdctl;
1790         u8 reg_idx = ring->reg_idx;
1791
1792         if (IXGBE_REMOVED(hw->hw_addr))
1793                 return;
1794         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1795         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1796
1797         /* write value back with RXDCTL.ENABLE bit cleared */
1798         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1799
1800         /* the hardware may take up to 100us to really disable the Rx queue */
1801         do {
1802                 udelay(10);
1803                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1804         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1805
1806         if (!wait_loop)
1807                 pr_err("RXDCTL.ENABLE queue %d not cleared while polling\n",
1808                        reg_idx);
1809 }
1810
1811 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1812                                          struct ixgbevf_ring *ring)
1813 {
1814         struct ixgbe_hw *hw = &adapter->hw;
1815         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1816         u32 rxdctl;
1817         u8 reg_idx = ring->reg_idx;
1818
1819         if (IXGBE_REMOVED(hw->hw_addr))
1820                 return;
1821         do {
1822                 usleep_range(1000, 2000);
1823                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1824         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1825
1826         if (!wait_loop)
1827                 pr_err("RXDCTL.ENABLE queue %d not set while polling\n",
1828                        reg_idx);
1829 }
1830
1831 /**
1832  * ixgbevf_init_rss_key - Initialize adapter RSS key
1833  * @adapter: device handle
1834  *
1835  * Allocates and initializes the RSS key if it is not allocated.
1836  **/
1837 static inline int ixgbevf_init_rss_key(struct ixgbevf_adapter *adapter)
1838 {
1839         u32 *rss_key;
1840
1841         if (!adapter->rss_key) {
1842                 rss_key = kzalloc(IXGBEVF_RSS_HASH_KEY_SIZE, GFP_KERNEL);
1843                 if (unlikely(!rss_key))
1844                         return -ENOMEM;
1845
1846                 netdev_rss_key_fill(rss_key, IXGBEVF_RSS_HASH_KEY_SIZE);
1847                 adapter->rss_key = rss_key;
1848         }
1849
1850         return 0;
1851 }
1852
1853 static void ixgbevf_setup_vfmrqc(struct ixgbevf_adapter *adapter)
1854 {
1855         struct ixgbe_hw *hw = &adapter->hw;
1856         u32 vfmrqc = 0, vfreta = 0;
1857         u16 rss_i = adapter->num_rx_queues;
1858         u8 i, j;
1859
1860         /* Fill out hash function seeds */
1861         for (i = 0; i < IXGBEVF_VFRSSRK_REGS; i++)
1862                 IXGBE_WRITE_REG(hw, IXGBE_VFRSSRK(i), *(adapter->rss_key + i));
1863
1864         for (i = 0, j = 0; i < IXGBEVF_X550_VFRETA_SIZE; i++, j++) {
1865                 if (j == rss_i)
1866                         j = 0;
1867
1868                 adapter->rss_indir_tbl[i] = j;
1869
1870                 vfreta |= j << (i & 0x3) * 8;
1871                 if ((i & 3) == 3) {
1872                         IXGBE_WRITE_REG(hw, IXGBE_VFRETA(i >> 2), vfreta);
1873                         vfreta = 0;
1874                 }
1875         }
1876
1877         /* Perform hash on these packet types */
1878         vfmrqc |= IXGBE_VFMRQC_RSS_FIELD_IPV4 |
1879                 IXGBE_VFMRQC_RSS_FIELD_IPV4_TCP |
1880                 IXGBE_VFMRQC_RSS_FIELD_IPV6 |
1881                 IXGBE_VFMRQC_RSS_FIELD_IPV6_TCP;
1882
1883         vfmrqc |= IXGBE_VFMRQC_RSSEN;
1884
1885         IXGBE_WRITE_REG(hw, IXGBE_VFMRQC, vfmrqc);
1886 }
1887
1888 static void ixgbevf_configure_rx_ring(struct ixgbevf_adapter *adapter,
1889                                       struct ixgbevf_ring *ring)
1890 {
1891         struct ixgbe_hw *hw = &adapter->hw;
1892         union ixgbe_adv_rx_desc *rx_desc;
1893         u64 rdba = ring->dma;
1894         u32 rxdctl;
1895         u8 reg_idx = ring->reg_idx;
1896
1897         /* disable queue to avoid issues while updating state */
1898         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1899         ixgbevf_disable_rx_queue(adapter, ring);
1900
1901         IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(reg_idx), rdba & DMA_BIT_MASK(32));
1902         IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(reg_idx), rdba >> 32);
1903         IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(reg_idx),
1904                         ring->count * sizeof(union ixgbe_adv_rx_desc));
1905
1906 #ifndef CONFIG_SPARC
1907         /* enable relaxed ordering */
1908         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1909                         IXGBE_DCA_RXCTRL_DESC_RRO_EN);
1910 #else
1911         IXGBE_WRITE_REG(hw, IXGBE_VFDCA_RXCTRL(reg_idx),
1912                         IXGBE_DCA_RXCTRL_DESC_RRO_EN |
1913                         IXGBE_DCA_RXCTRL_DATA_WRO_EN);
1914 #endif
1915
1916         /* reset head and tail pointers */
1917         IXGBE_WRITE_REG(hw, IXGBE_VFRDH(reg_idx), 0);
1918         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(reg_idx), 0);
1919         ring->tail = adapter->io_addr + IXGBE_VFRDT(reg_idx);
1920
1921         /* initialize rx_buffer_info */
1922         memset(ring->rx_buffer_info, 0,
1923                sizeof(struct ixgbevf_rx_buffer) * ring->count);
1924
1925         /* initialize Rx descriptor 0 */
1926         rx_desc = IXGBEVF_RX_DESC(ring, 0);
1927         rx_desc->wb.upper.length = 0;
1928
1929         /* reset ntu and ntc to place SW in sync with hardwdare */
1930         ring->next_to_clean = 0;
1931         ring->next_to_use = 0;
1932         ring->next_to_alloc = 0;
1933
1934         ixgbevf_configure_srrctl(adapter, ring, reg_idx);
1935
1936         /* RXDCTL.RLPML does not work on 82599 */
1937         if (adapter->hw.mac.type != ixgbe_mac_82599_vf) {
1938                 rxdctl &= ~(IXGBE_RXDCTL_RLPMLMASK |
1939                             IXGBE_RXDCTL_RLPML_EN);
1940
1941 #if (PAGE_SIZE < 8192)
1942                 /* Limit the maximum frame size so we don't overrun the skb */
1943                 if (ring_uses_build_skb(ring) &&
1944                     !ring_uses_large_buffer(ring))
1945                         rxdctl |= IXGBEVF_MAX_FRAME_BUILD_SKB |
1946                                   IXGBE_RXDCTL_RLPML_EN;
1947 #endif
1948         }
1949
1950         rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1951         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1952
1953         ixgbevf_rx_desc_queue_enable(adapter, ring);
1954         ixgbevf_alloc_rx_buffers(ring, ixgbevf_desc_unused(ring));
1955 }
1956
1957 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter,
1958                                       struct ixgbevf_ring *rx_ring)
1959 {
1960         struct net_device *netdev = adapter->netdev;
1961         unsigned int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1962
1963         /* set build_skb and buffer size flags */
1964         clear_ring_build_skb_enabled(rx_ring);
1965         clear_ring_uses_large_buffer(rx_ring);
1966
1967         if (adapter->flags & IXGBEVF_FLAGS_LEGACY_RX)
1968                 return;
1969
1970         set_ring_build_skb_enabled(rx_ring);
1971
1972         if (PAGE_SIZE < 8192) {
1973                 if (max_frame <= IXGBEVF_MAX_FRAME_BUILD_SKB)
1974                         return;
1975
1976                 set_ring_uses_large_buffer(rx_ring);
1977         }
1978 }
1979
1980 /**
1981  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1982  * @adapter: board private structure
1983  *
1984  * Configure the Rx unit of the MAC after a reset.
1985  **/
1986 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1987 {
1988         struct ixgbe_hw *hw = &adapter->hw;
1989         struct net_device *netdev = adapter->netdev;
1990         int i, ret;
1991
1992         ixgbevf_setup_psrtype(adapter);
1993         if (hw->mac.type >= ixgbe_mac_X550_vf)
1994                 ixgbevf_setup_vfmrqc(adapter);
1995
1996         spin_lock_bh(&adapter->mbx_lock);
1997         /* notify the PF of our intent to use this size of frame */
1998         ret = hw->mac.ops.set_rlpml(hw, netdev->mtu + ETH_HLEN + ETH_FCS_LEN);
1999         spin_unlock_bh(&adapter->mbx_lock);
2000         if (ret)
2001                 dev_err(&adapter->pdev->dev,
2002                         "Failed to set MTU at %d\n", netdev->mtu);
2003
2004         /* Setup the HW Rx Head and Tail Descriptor Pointers and
2005          * the Base and Length of the Rx Descriptor Ring
2006          */
2007         for (i = 0; i < adapter->num_rx_queues; i++) {
2008                 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
2009
2010                 ixgbevf_set_rx_buffer_len(adapter, rx_ring);
2011                 ixgbevf_configure_rx_ring(adapter, rx_ring);
2012         }
2013 }
2014
2015 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
2016                                    __be16 proto, u16 vid)
2017 {
2018         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2019         struct ixgbe_hw *hw = &adapter->hw;
2020         int err;
2021
2022         spin_lock_bh(&adapter->mbx_lock);
2023
2024         /* add VID to filter table */
2025         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
2026
2027         spin_unlock_bh(&adapter->mbx_lock);
2028
2029         /* translate error return types so error makes sense */
2030         if (err == IXGBE_ERR_MBX)
2031                 return -EIO;
2032
2033         if (err == IXGBE_ERR_INVALID_ARGUMENT)
2034                 return -EACCES;
2035
2036         set_bit(vid, adapter->active_vlans);
2037
2038         return err;
2039 }
2040
2041 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
2042                                     __be16 proto, u16 vid)
2043 {
2044         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2045         struct ixgbe_hw *hw = &adapter->hw;
2046         int err;
2047
2048         spin_lock_bh(&adapter->mbx_lock);
2049
2050         /* remove VID from filter table */
2051         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
2052
2053         spin_unlock_bh(&adapter->mbx_lock);
2054
2055         clear_bit(vid, adapter->active_vlans);
2056
2057         return err;
2058 }
2059
2060 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
2061 {
2062         u16 vid;
2063
2064         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2065                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
2066                                         htons(ETH_P_8021Q), vid);
2067 }
2068
2069 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
2070 {
2071         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2072         struct ixgbe_hw *hw = &adapter->hw;
2073         int count = 0;
2074
2075         if ((netdev_uc_count(netdev)) > 10) {
2076                 pr_err("Too many unicast filters - No Space\n");
2077                 return -ENOSPC;
2078         }
2079
2080         if (!netdev_uc_empty(netdev)) {
2081                 struct netdev_hw_addr *ha;
2082
2083                 netdev_for_each_uc_addr(ha, netdev) {
2084                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
2085                         udelay(200);
2086                 }
2087         } else {
2088                 /* If the list is empty then send message to PF driver to
2089                  * clear all MAC VLANs on this VF.
2090                  */
2091                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
2092         }
2093
2094         return count;
2095 }
2096
2097 /**
2098  * ixgbevf_set_rx_mode - Multicast and unicast set
2099  * @netdev: network interface device structure
2100  *
2101  * The set_rx_method entry point is called whenever the multicast address
2102  * list, unicast address list or the network interface flags are updated.
2103  * This routine is responsible for configuring the hardware for proper
2104  * multicast mode and configuring requested unicast filters.
2105  **/
2106 static void ixgbevf_set_rx_mode(struct net_device *netdev)
2107 {
2108         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2109         struct ixgbe_hw *hw = &adapter->hw;
2110         unsigned int flags = netdev->flags;
2111         int xcast_mode;
2112
2113         /* request the most inclusive mode we need */
2114         if (flags & IFF_PROMISC)
2115                 xcast_mode = IXGBEVF_XCAST_MODE_PROMISC;
2116         else if (flags & IFF_ALLMULTI)
2117                 xcast_mode = IXGBEVF_XCAST_MODE_ALLMULTI;
2118         else if (flags & (IFF_BROADCAST | IFF_MULTICAST))
2119                 xcast_mode = IXGBEVF_XCAST_MODE_MULTI;
2120         else
2121                 xcast_mode = IXGBEVF_XCAST_MODE_NONE;
2122
2123         spin_lock_bh(&adapter->mbx_lock);
2124
2125         hw->mac.ops.update_xcast_mode(hw, xcast_mode);
2126
2127         /* reprogram multicast list */
2128         hw->mac.ops.update_mc_addr_list(hw, netdev);
2129
2130         ixgbevf_write_uc_addr_list(netdev);
2131
2132         spin_unlock_bh(&adapter->mbx_lock);
2133 }
2134
2135 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
2136 {
2137         int q_idx;
2138         struct ixgbevf_q_vector *q_vector;
2139         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2140
2141         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2142                 q_vector = adapter->q_vector[q_idx];
2143                 napi_enable(&q_vector->napi);
2144         }
2145 }
2146
2147 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
2148 {
2149         int q_idx;
2150         struct ixgbevf_q_vector *q_vector;
2151         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2152
2153         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
2154                 q_vector = adapter->q_vector[q_idx];
2155                 napi_disable(&q_vector->napi);
2156         }
2157 }
2158
2159 static int ixgbevf_configure_dcb(struct ixgbevf_adapter *adapter)
2160 {
2161         struct ixgbe_hw *hw = &adapter->hw;
2162         unsigned int def_q = 0;
2163         unsigned int num_tcs = 0;
2164         unsigned int num_rx_queues = adapter->num_rx_queues;
2165         unsigned int num_tx_queues = adapter->num_tx_queues;
2166         int err;
2167
2168         spin_lock_bh(&adapter->mbx_lock);
2169
2170         /* fetch queue configuration from the PF */
2171         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2172
2173         spin_unlock_bh(&adapter->mbx_lock);
2174
2175         if (err)
2176                 return err;
2177
2178         if (num_tcs > 1) {
2179                 /* we need only one Tx queue */
2180                 num_tx_queues = 1;
2181
2182                 /* update default Tx ring register index */
2183                 adapter->tx_ring[0]->reg_idx = def_q;
2184
2185                 /* we need as many queues as traffic classes */
2186                 num_rx_queues = num_tcs;
2187         }
2188
2189         /* if we have a bad config abort request queue reset */
2190         if ((adapter->num_rx_queues != num_rx_queues) ||
2191             (adapter->num_tx_queues != num_tx_queues)) {
2192                 /* force mailbox timeout to prevent further messages */
2193                 hw->mbx.timeout = 0;
2194
2195                 /* wait for watchdog to come around and bail us out */
2196                 set_bit(__IXGBEVF_QUEUE_RESET_REQUESTED, &adapter->state);
2197         }
2198
2199         return 0;
2200 }
2201
2202 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
2203 {
2204         ixgbevf_configure_dcb(adapter);
2205
2206         ixgbevf_set_rx_mode(adapter->netdev);
2207
2208         ixgbevf_restore_vlan(adapter);
2209         ixgbevf_ipsec_restore(adapter);
2210
2211         ixgbevf_configure_tx(adapter);
2212         ixgbevf_configure_rx(adapter);
2213 }
2214
2215 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
2216 {
2217         /* Only save pre-reset stats if there are some */
2218         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
2219                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
2220                         adapter->stats.base_vfgprc;
2221                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
2222                         adapter->stats.base_vfgptc;
2223                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
2224                         adapter->stats.base_vfgorc;
2225                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
2226                         adapter->stats.base_vfgotc;
2227                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
2228                         adapter->stats.base_vfmprc;
2229         }
2230 }
2231
2232 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
2233 {
2234         struct ixgbe_hw *hw = &adapter->hw;
2235
2236         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
2237         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
2238         adapter->stats.last_vfgorc |=
2239                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
2240         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
2241         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
2242         adapter->stats.last_vfgotc |=
2243                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
2244         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
2245
2246         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
2247         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
2248         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
2249         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
2250         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
2251 }
2252
2253 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
2254 {
2255         struct ixgbe_hw *hw = &adapter->hw;
2256         int api[] = { ixgbe_mbox_api_14,
2257                       ixgbe_mbox_api_13,
2258                       ixgbe_mbox_api_12,
2259                       ixgbe_mbox_api_11,
2260                       ixgbe_mbox_api_10,
2261                       ixgbe_mbox_api_unknown };
2262         int err, idx = 0;
2263
2264         spin_lock_bh(&adapter->mbx_lock);
2265
2266         while (api[idx] != ixgbe_mbox_api_unknown) {
2267                 err = hw->mac.ops.negotiate_api_version(hw, api[idx]);
2268                 if (!err)
2269                         break;
2270                 idx++;
2271         }
2272
2273         spin_unlock_bh(&adapter->mbx_lock);
2274 }
2275
2276 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
2277 {
2278         struct net_device *netdev = adapter->netdev;
2279         struct ixgbe_hw *hw = &adapter->hw;
2280
2281         ixgbevf_configure_msix(adapter);
2282
2283         spin_lock_bh(&adapter->mbx_lock);
2284
2285         if (is_valid_ether_addr(hw->mac.addr))
2286                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2287         else
2288                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
2289
2290         spin_unlock_bh(&adapter->mbx_lock);
2291
2292         smp_mb__before_atomic();
2293         clear_bit(__IXGBEVF_DOWN, &adapter->state);
2294         ixgbevf_napi_enable_all(adapter);
2295
2296         /* clear any pending interrupts, may auto mask */
2297         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2298         ixgbevf_irq_enable(adapter);
2299
2300         /* enable transmits */
2301         netif_tx_start_all_queues(netdev);
2302
2303         ixgbevf_save_reset_stats(adapter);
2304         ixgbevf_init_last_counter_stats(adapter);
2305
2306         hw->mac.get_link_status = 1;
2307         mod_timer(&adapter->service_timer, jiffies);
2308 }
2309
2310 void ixgbevf_up(struct ixgbevf_adapter *adapter)
2311 {
2312         ixgbevf_configure(adapter);
2313
2314         ixgbevf_up_complete(adapter);
2315 }
2316
2317 /**
2318  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
2319  * @rx_ring: ring to free buffers from
2320  **/
2321 static void ixgbevf_clean_rx_ring(struct ixgbevf_ring *rx_ring)
2322 {
2323         u16 i = rx_ring->next_to_clean;
2324
2325         /* Free Rx ring sk_buff */
2326         if (rx_ring->skb) {
2327                 dev_kfree_skb(rx_ring->skb);
2328                 rx_ring->skb = NULL;
2329         }
2330
2331         /* Free all the Rx ring pages */
2332         while (i != rx_ring->next_to_alloc) {
2333                 struct ixgbevf_rx_buffer *rx_buffer;
2334
2335                 rx_buffer = &rx_ring->rx_buffer_info[i];
2336
2337                 /* Invalidate cache lines that may have been written to by
2338                  * device so that we avoid corrupting memory.
2339                  */
2340                 dma_sync_single_range_for_cpu(rx_ring->dev,
2341                                               rx_buffer->dma,
2342                                               rx_buffer->page_offset,
2343                                               ixgbevf_rx_bufsz(rx_ring),
2344                                               DMA_FROM_DEVICE);
2345
2346                 /* free resources associated with mapping */
2347                 dma_unmap_page_attrs(rx_ring->dev,
2348                                      rx_buffer->dma,
2349                                      ixgbevf_rx_pg_size(rx_ring),
2350                                      DMA_FROM_DEVICE,
2351                                      IXGBEVF_RX_DMA_ATTR);
2352
2353                 __page_frag_cache_drain(rx_buffer->page,
2354                                         rx_buffer->pagecnt_bias);
2355
2356                 i++;
2357                 if (i == rx_ring->count)
2358                         i = 0;
2359         }
2360
2361         rx_ring->next_to_alloc = 0;
2362         rx_ring->next_to_clean = 0;
2363         rx_ring->next_to_use = 0;
2364 }
2365
2366 /**
2367  * ixgbevf_clean_tx_ring - Free Tx Buffers
2368  * @tx_ring: ring to be cleaned
2369  **/
2370 static void ixgbevf_clean_tx_ring(struct ixgbevf_ring *tx_ring)
2371 {
2372         u16 i = tx_ring->next_to_clean;
2373         struct ixgbevf_tx_buffer *tx_buffer = &tx_ring->tx_buffer_info[i];
2374
2375         while (i != tx_ring->next_to_use) {
2376                 union ixgbe_adv_tx_desc *eop_desc, *tx_desc;
2377
2378                 /* Free all the Tx ring sk_buffs */
2379                 if (ring_is_xdp(tx_ring))
2380                         page_frag_free(tx_buffer->data);
2381                 else
2382                         dev_kfree_skb_any(tx_buffer->skb);
2383
2384                 /* unmap skb header data */
2385                 dma_unmap_single(tx_ring->dev,
2386                                  dma_unmap_addr(tx_buffer, dma),
2387                                  dma_unmap_len(tx_buffer, len),
2388                                  DMA_TO_DEVICE);
2389
2390                 /* check for eop_desc to determine the end of the packet */
2391                 eop_desc = tx_buffer->next_to_watch;
2392                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2393
2394                 /* unmap remaining buffers */
2395                 while (tx_desc != eop_desc) {
2396                         tx_buffer++;
2397                         tx_desc++;
2398                         i++;
2399                         if (unlikely(i == tx_ring->count)) {
2400                                 i = 0;
2401                                 tx_buffer = tx_ring->tx_buffer_info;
2402                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
2403                         }
2404
2405                         /* unmap any remaining paged data */
2406                         if (dma_unmap_len(tx_buffer, len))
2407                                 dma_unmap_page(tx_ring->dev,
2408                                                dma_unmap_addr(tx_buffer, dma),
2409                                                dma_unmap_len(tx_buffer, len),
2410                                                DMA_TO_DEVICE);
2411                 }
2412
2413                 /* move us one more past the eop_desc for start of next pkt */
2414                 tx_buffer++;
2415                 i++;
2416                 if (unlikely(i == tx_ring->count)) {
2417                         i = 0;
2418                         tx_buffer = tx_ring->tx_buffer_info;
2419                 }
2420         }
2421
2422         /* reset next_to_use and next_to_clean */
2423         tx_ring->next_to_use = 0;
2424         tx_ring->next_to_clean = 0;
2425
2426 }
2427
2428 /**
2429  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
2430  * @adapter: board private structure
2431  **/
2432 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
2433 {
2434         int i;
2435
2436         for (i = 0; i < adapter->num_rx_queues; i++)
2437                 ixgbevf_clean_rx_ring(adapter->rx_ring[i]);
2438 }
2439
2440 /**
2441  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
2442  * @adapter: board private structure
2443  **/
2444 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
2445 {
2446         int i;
2447
2448         for (i = 0; i < adapter->num_tx_queues; i++)
2449                 ixgbevf_clean_tx_ring(adapter->tx_ring[i]);
2450         for (i = 0; i < adapter->num_xdp_queues; i++)
2451                 ixgbevf_clean_tx_ring(adapter->xdp_ring[i]);
2452 }
2453
2454 void ixgbevf_down(struct ixgbevf_adapter *adapter)
2455 {
2456         struct net_device *netdev = adapter->netdev;
2457         struct ixgbe_hw *hw = &adapter->hw;
2458         int i;
2459
2460         /* signal that we are down to the interrupt handler */
2461         if (test_and_set_bit(__IXGBEVF_DOWN, &adapter->state))
2462                 return; /* do nothing if already down */
2463
2464         /* disable all enabled Rx queues */
2465         for (i = 0; i < adapter->num_rx_queues; i++)
2466                 ixgbevf_disable_rx_queue(adapter, adapter->rx_ring[i]);
2467
2468         usleep_range(10000, 20000);
2469
2470         netif_tx_stop_all_queues(netdev);
2471
2472         /* call carrier off first to avoid false dev_watchdog timeouts */
2473         netif_carrier_off(netdev);
2474         netif_tx_disable(netdev);
2475
2476         ixgbevf_irq_disable(adapter);
2477
2478         ixgbevf_napi_disable_all(adapter);
2479
2480         del_timer_sync(&adapter->service_timer);
2481
2482         /* disable transmits in the hardware now that interrupts are off */
2483         for (i = 0; i < adapter->num_tx_queues; i++) {
2484                 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
2485
2486                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2487                                 IXGBE_TXDCTL_SWFLSH);
2488         }
2489
2490         for (i = 0; i < adapter->num_xdp_queues; i++) {
2491                 u8 reg_idx = adapter->xdp_ring[i]->reg_idx;
2492
2493                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(reg_idx),
2494                                 IXGBE_TXDCTL_SWFLSH);
2495         }
2496
2497         if (!pci_channel_offline(adapter->pdev))
2498                 ixgbevf_reset(adapter);
2499
2500         ixgbevf_clean_all_tx_rings(adapter);
2501         ixgbevf_clean_all_rx_rings(adapter);
2502 }
2503
2504 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
2505 {
2506         WARN_ON(in_interrupt());
2507
2508         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
2509                 msleep(1);
2510
2511         ixgbevf_down(adapter);
2512         ixgbevf_up(adapter);
2513
2514         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
2515 }
2516
2517 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
2518 {
2519         struct ixgbe_hw *hw = &adapter->hw;
2520         struct net_device *netdev = adapter->netdev;
2521
2522         if (hw->mac.ops.reset_hw(hw)) {
2523                 hw_dbg(hw, "PF still resetting\n");
2524         } else {
2525                 hw->mac.ops.init_hw(hw);
2526                 ixgbevf_negotiate_api(adapter);
2527         }
2528
2529         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
2530                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2531                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2532         }
2533
2534         adapter->last_reset = jiffies;
2535 }
2536
2537 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
2538                                         int vectors)
2539 {
2540         int vector_threshold;
2541
2542         /* We'll want at least 2 (vector_threshold):
2543          * 1) TxQ[0] + RxQ[0] handler
2544          * 2) Other (Link Status Change, etc.)
2545          */
2546         vector_threshold = MIN_MSIX_COUNT;
2547
2548         /* The more we get, the more we will assign to Tx/Rx Cleanup
2549          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2550          * Right now, we simply care about how many we'll get; we'll
2551          * set them up later while requesting irq's.
2552          */
2553         vectors = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
2554                                         vector_threshold, vectors);
2555
2556         if (vectors < 0) {
2557                 dev_err(&adapter->pdev->dev,
2558                         "Unable to allocate MSI-X interrupts\n");
2559                 kfree(adapter->msix_entries);
2560                 adapter->msix_entries = NULL;
2561                 return vectors;
2562         }
2563
2564         /* Adjust for only the vectors we'll use, which is minimum
2565          * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
2566          * vectors we were allocated.
2567          */
2568         adapter->num_msix_vectors = vectors;
2569
2570         return 0;
2571 }
2572
2573 /**
2574  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
2575  * @adapter: board private structure to initialize
2576  *
2577  * This is the top level queue allocation routine.  The order here is very
2578  * important, starting with the "most" number of features turned on at once,
2579  * and ending with the smallest set of features.  This way large combinations
2580  * can be allocated if they're turned on, and smaller combinations are the
2581  * fallthrough conditions.
2582  *
2583  **/
2584 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
2585 {
2586         struct ixgbe_hw *hw = &adapter->hw;
2587         unsigned int def_q = 0;
2588         unsigned int num_tcs = 0;
2589         int err;
2590
2591         /* Start with base case */
2592         adapter->num_rx_queues = 1;
2593         adapter->num_tx_queues = 1;
2594         adapter->num_xdp_queues = 0;
2595
2596         spin_lock_bh(&adapter->mbx_lock);
2597
2598         /* fetch queue configuration from the PF */
2599         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2600
2601         spin_unlock_bh(&adapter->mbx_lock);
2602
2603         if (err)
2604                 return;
2605
2606         /* we need as many queues as traffic classes */
2607         if (num_tcs > 1) {
2608                 adapter->num_rx_queues = num_tcs;
2609         } else {
2610                 u16 rss = min_t(u16, num_online_cpus(), IXGBEVF_MAX_RSS_QUEUES);
2611
2612                 switch (hw->api_version) {
2613                 case ixgbe_mbox_api_11:
2614                 case ixgbe_mbox_api_12:
2615                 case ixgbe_mbox_api_13:
2616                 case ixgbe_mbox_api_14:
2617                         if (adapter->xdp_prog &&
2618                             hw->mac.max_tx_queues == rss)
2619                                 rss = rss > 3 ? 2 : 1;
2620
2621                         adapter->num_rx_queues = rss;
2622                         adapter->num_tx_queues = rss;
2623                         adapter->num_xdp_queues = adapter->xdp_prog ? rss : 0;
2624                 default:
2625                         break;
2626                 }
2627         }
2628 }
2629
2630 /**
2631  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
2632  * @adapter: board private structure to initialize
2633  *
2634  * Attempt to configure the interrupts using the best available
2635  * capabilities of the hardware and the kernel.
2636  **/
2637 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
2638 {
2639         int vector, v_budget;
2640
2641         /* It's easy to be greedy for MSI-X vectors, but it really
2642          * doesn't do us much good if we have a lot more vectors
2643          * than CPU's.  So let's be conservative and only ask for
2644          * (roughly) the same number of vectors as there are CPU's.
2645          * The default is to use pairs of vectors.
2646          */
2647         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
2648         v_budget = min_t(int, v_budget, num_online_cpus());
2649         v_budget += NON_Q_VECTORS;
2650
2651         adapter->msix_entries = kcalloc(v_budget,
2652                                         sizeof(struct msix_entry), GFP_KERNEL);
2653         if (!adapter->msix_entries)
2654                 return -ENOMEM;
2655
2656         for (vector = 0; vector < v_budget; vector++)
2657                 adapter->msix_entries[vector].entry = vector;
2658
2659         /* A failure in MSI-X entry allocation isn't fatal, but the VF driver
2660          * does not support any other modes, so we will simply fail here. Note
2661          * that we clean up the msix_entries pointer else-where.
2662          */
2663         return ixgbevf_acquire_msix_vectors(adapter, v_budget);
2664 }
2665
2666 static void ixgbevf_add_ring(struct ixgbevf_ring *ring,
2667                              struct ixgbevf_ring_container *head)
2668 {
2669         ring->next = head->ring;
2670         head->ring = ring;
2671         head->count++;
2672 }
2673
2674 /**
2675  * ixgbevf_alloc_q_vector - Allocate memory for a single interrupt vector
2676  * @adapter: board private structure to initialize
2677  * @v_idx: index of vector in adapter struct
2678  * @txr_count: number of Tx rings for q vector
2679  * @txr_idx: index of first Tx ring to assign
2680  * @xdp_count: total number of XDP rings to allocate
2681  * @xdp_idx: index of first XDP ring to allocate
2682  * @rxr_count: number of Rx rings for q vector
2683  * @rxr_idx: index of first Rx ring to assign
2684  *
2685  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
2686  **/
2687 static int ixgbevf_alloc_q_vector(struct ixgbevf_adapter *adapter, int v_idx,
2688                                   int txr_count, int txr_idx,
2689                                   int xdp_count, int xdp_idx,
2690                                   int rxr_count, int rxr_idx)
2691 {
2692         struct ixgbevf_q_vector *q_vector;
2693         int reg_idx = txr_idx + xdp_idx;
2694         struct ixgbevf_ring *ring;
2695         int ring_count, size;
2696
2697         ring_count = txr_count + xdp_count + rxr_count;
2698         size = sizeof(*q_vector) + (sizeof(*ring) * ring_count);
2699
2700         /* allocate q_vector and rings */
2701         q_vector = kzalloc(size, GFP_KERNEL);
2702         if (!q_vector)
2703                 return -ENOMEM;
2704
2705         /* initialize NAPI */
2706         netif_napi_add(adapter->netdev, &q_vector->napi, ixgbevf_poll, 64);
2707
2708         /* tie q_vector and adapter together */
2709         adapter->q_vector[v_idx] = q_vector;
2710         q_vector->adapter = adapter;
2711         q_vector->v_idx = v_idx;
2712
2713         /* initialize pointer to rings */
2714         ring = q_vector->ring;
2715
2716         while (txr_count) {
2717                 /* assign generic ring traits */
2718                 ring->dev = &adapter->pdev->dev;
2719                 ring->netdev = adapter->netdev;
2720
2721                 /* configure backlink on ring */
2722                 ring->q_vector = q_vector;
2723
2724                 /* update q_vector Tx values */
2725                 ixgbevf_add_ring(ring, &q_vector->tx);
2726
2727                 /* apply Tx specific ring traits */
2728                 ring->count = adapter->tx_ring_count;
2729                 ring->queue_index = txr_idx;
2730                 ring->reg_idx = reg_idx;
2731
2732                 /* assign ring to adapter */
2733                  adapter->tx_ring[txr_idx] = ring;
2734
2735                 /* update count and index */
2736                 txr_count--;
2737                 txr_idx++;
2738                 reg_idx++;
2739
2740                 /* push pointer to next ring */
2741                 ring++;
2742         }
2743
2744         while (xdp_count) {
2745                 /* assign generic ring traits */
2746                 ring->dev = &adapter->pdev->dev;
2747                 ring->netdev = adapter->netdev;
2748
2749                 /* configure backlink on ring */
2750                 ring->q_vector = q_vector;
2751
2752                 /* update q_vector Tx values */
2753                 ixgbevf_add_ring(ring, &q_vector->tx);
2754
2755                 /* apply Tx specific ring traits */
2756                 ring->count = adapter->tx_ring_count;
2757                 ring->queue_index = xdp_idx;
2758                 ring->reg_idx = reg_idx;
2759                 set_ring_xdp(ring);
2760
2761                 /* assign ring to adapter */
2762                 adapter->xdp_ring[xdp_idx] = ring;
2763
2764                 /* update count and index */
2765                 xdp_count--;
2766                 xdp_idx++;
2767                 reg_idx++;
2768
2769                 /* push pointer to next ring */
2770                 ring++;
2771         }
2772
2773         while (rxr_count) {
2774                 /* assign generic ring traits */
2775                 ring->dev = &adapter->pdev->dev;
2776                 ring->netdev = adapter->netdev;
2777
2778                 /* configure backlink on ring */
2779                 ring->q_vector = q_vector;
2780
2781                 /* update q_vector Rx values */
2782                 ixgbevf_add_ring(ring, &q_vector->rx);
2783
2784                 /* apply Rx specific ring traits */
2785                 ring->count = adapter->rx_ring_count;
2786                 ring->queue_index = rxr_idx;
2787                 ring->reg_idx = rxr_idx;
2788
2789                 /* assign ring to adapter */
2790                 adapter->rx_ring[rxr_idx] = ring;
2791
2792                 /* update count and index */
2793                 rxr_count--;
2794                 rxr_idx++;
2795
2796                 /* push pointer to next ring */
2797                 ring++;
2798         }
2799
2800         return 0;
2801 }
2802
2803 /**
2804  * ixgbevf_free_q_vector - Free memory allocated for specific interrupt vector
2805  * @adapter: board private structure to initialize
2806  * @v_idx: index of vector in adapter struct
2807  *
2808  * This function frees the memory allocated to the q_vector.  In addition if
2809  * NAPI is enabled it will delete any references to the NAPI struct prior
2810  * to freeing the q_vector.
2811  **/
2812 static void ixgbevf_free_q_vector(struct ixgbevf_adapter *adapter, int v_idx)
2813 {
2814         struct ixgbevf_q_vector *q_vector = adapter->q_vector[v_idx];
2815         struct ixgbevf_ring *ring;
2816
2817         ixgbevf_for_each_ring(ring, q_vector->tx) {
2818                 if (ring_is_xdp(ring))
2819                         adapter->xdp_ring[ring->queue_index] = NULL;
2820                 else
2821                         adapter->tx_ring[ring->queue_index] = NULL;
2822         }
2823
2824         ixgbevf_for_each_ring(ring, q_vector->rx)
2825                 adapter->rx_ring[ring->queue_index] = NULL;
2826
2827         adapter->q_vector[v_idx] = NULL;
2828         netif_napi_del(&q_vector->napi);
2829
2830         /* ixgbevf_get_stats() might access the rings on this vector,
2831          * we must wait a grace period before freeing it.
2832          */
2833         kfree_rcu(q_vector, rcu);
2834 }
2835
2836 /**
2837  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2838  * @adapter: board private structure to initialize
2839  *
2840  * We allocate one q_vector per queue interrupt.  If allocation fails we
2841  * return -ENOMEM.
2842  **/
2843 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2844 {
2845         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2846         int rxr_remaining = adapter->num_rx_queues;
2847         int txr_remaining = adapter->num_tx_queues;
2848         int xdp_remaining = adapter->num_xdp_queues;
2849         int rxr_idx = 0, txr_idx = 0, xdp_idx = 0, v_idx = 0;
2850         int err;
2851
2852         if (q_vectors >= (rxr_remaining + txr_remaining + xdp_remaining)) {
2853                 for (; rxr_remaining; v_idx++, q_vectors--) {
2854                         int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2855
2856                         err = ixgbevf_alloc_q_vector(adapter, v_idx,
2857                                                      0, 0, 0, 0, rqpv, rxr_idx);
2858                         if (err)
2859                                 goto err_out;
2860
2861                         /* update counts and index */
2862                         rxr_remaining -= rqpv;
2863                         rxr_idx += rqpv;
2864                 }
2865         }
2866
2867         for (; q_vectors; v_idx++, q_vectors--) {
2868                 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors);
2869                 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors);
2870                 int xqpv = DIV_ROUND_UP(xdp_remaining, q_vectors);
2871
2872                 err = ixgbevf_alloc_q_vector(adapter, v_idx,
2873                                              tqpv, txr_idx,
2874                                              xqpv, xdp_idx,
2875                                              rqpv, rxr_idx);
2876
2877                 if (err)
2878                         goto err_out;
2879
2880                 /* update counts and index */
2881                 rxr_remaining -= rqpv;
2882                 rxr_idx += rqpv;
2883                 txr_remaining -= tqpv;
2884                 txr_idx += tqpv;
2885                 xdp_remaining -= xqpv;
2886                 xdp_idx += xqpv;
2887         }
2888
2889         return 0;
2890
2891 err_out:
2892         while (v_idx) {
2893                 v_idx--;
2894                 ixgbevf_free_q_vector(adapter, v_idx);
2895         }
2896
2897         return -ENOMEM;
2898 }
2899
2900 /**
2901  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2902  * @adapter: board private structure to initialize
2903  *
2904  * This function frees the memory allocated to the q_vectors.  In addition if
2905  * NAPI is enabled it will delete any references to the NAPI struct prior
2906  * to freeing the q_vector.
2907  **/
2908 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2909 {
2910         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2911
2912         while (q_vectors) {
2913                 q_vectors--;
2914                 ixgbevf_free_q_vector(adapter, q_vectors);
2915         }
2916 }
2917
2918 /**
2919  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2920  * @adapter: board private structure
2921  *
2922  **/
2923 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2924 {
2925         if (!adapter->msix_entries)
2926                 return;
2927
2928         pci_disable_msix(adapter->pdev);
2929         kfree(adapter->msix_entries);
2930         adapter->msix_entries = NULL;
2931 }
2932
2933 /**
2934  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2935  * @adapter: board private structure to initialize
2936  *
2937  **/
2938 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2939 {
2940         int err;
2941
2942         /* Number of supported queues */
2943         ixgbevf_set_num_queues(adapter);
2944
2945         err = ixgbevf_set_interrupt_capability(adapter);
2946         if (err) {
2947                 hw_dbg(&adapter->hw,
2948                        "Unable to setup interrupt capabilities\n");
2949                 goto err_set_interrupt;
2950         }
2951
2952         err = ixgbevf_alloc_q_vectors(adapter);
2953         if (err) {
2954                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue vectors\n");
2955                 goto err_alloc_q_vectors;
2956         }
2957
2958         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u XDP Queue count %u\n",
2959                (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
2960                adapter->num_rx_queues, adapter->num_tx_queues,
2961                adapter->num_xdp_queues);
2962
2963         set_bit(__IXGBEVF_DOWN, &adapter->state);
2964
2965         return 0;
2966 err_alloc_q_vectors:
2967         ixgbevf_reset_interrupt_capability(adapter);
2968 err_set_interrupt:
2969         return err;
2970 }
2971
2972 /**
2973  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2974  * @adapter: board private structure to clear interrupt scheme on
2975  *
2976  * We go through and clear interrupt specific resources and reset the structure
2977  * to pre-load conditions
2978  **/
2979 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2980 {
2981         adapter->num_tx_queues = 0;
2982         adapter->num_xdp_queues = 0;
2983         adapter->num_rx_queues = 0;
2984
2985         ixgbevf_free_q_vectors(adapter);
2986         ixgbevf_reset_interrupt_capability(adapter);
2987 }
2988
2989 /**
2990  * ixgbevf_sw_init - Initialize general software structures
2991  * @adapter: board private structure to initialize
2992  *
2993  * ixgbevf_sw_init initializes the Adapter private data structure.
2994  * Fields are initialized based on PCI device information and
2995  * OS network device settings (MTU size).
2996  **/
2997 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2998 {
2999         struct ixgbe_hw *hw = &adapter->hw;
3000         struct pci_dev *pdev = adapter->pdev;
3001         struct net_device *netdev = adapter->netdev;
3002         int err;
3003
3004         /* PCI config space info */
3005         hw->vendor_id = pdev->vendor;
3006         hw->device_id = pdev->device;
3007         hw->revision_id = pdev->revision;
3008         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3009         hw->subsystem_device_id = pdev->subsystem_device;
3010
3011         hw->mbx.ops.init_params(hw);
3012
3013         if (hw->mac.type >= ixgbe_mac_X550_vf) {
3014                 err = ixgbevf_init_rss_key(adapter);
3015                 if (err)
3016                         goto out;
3017         }
3018
3019         /* assume legacy case in which PF would only give VF 2 queues */
3020         hw->mac.max_tx_queues = 2;
3021         hw->mac.max_rx_queues = 2;
3022
3023         /* lock to protect mailbox accesses */
3024         spin_lock_init(&adapter->mbx_lock);
3025
3026         err = hw->mac.ops.reset_hw(hw);
3027         if (err) {
3028                 dev_info(&pdev->dev,
3029                          "PF still in reset state.  Is the PF interface up?\n");
3030         } else {
3031                 err = hw->mac.ops.init_hw(hw);
3032                 if (err) {
3033                         pr_err("init_shared_code failed: %d\n", err);
3034                         goto out;
3035                 }
3036                 ixgbevf_negotiate_api(adapter);
3037                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
3038                 if (err)
3039                         dev_info(&pdev->dev, "Error reading MAC address\n");
3040                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
3041                         dev_info(&pdev->dev,
3042                                  "MAC address not assigned by administrator.\n");
3043                 ether_addr_copy(netdev->dev_addr, hw->mac.addr);
3044         }
3045
3046         if (!is_valid_ether_addr(netdev->dev_addr)) {
3047                 dev_info(&pdev->dev, "Assigning random MAC address\n");
3048                 eth_hw_addr_random(netdev);
3049                 ether_addr_copy(hw->mac.addr, netdev->dev_addr);
3050                 ether_addr_copy(hw->mac.perm_addr, netdev->dev_addr);
3051         }
3052
3053         /* Enable dynamic interrupt throttling rates */
3054         adapter->rx_itr_setting = 1;
3055         adapter->tx_itr_setting = 1;
3056
3057         /* set default ring sizes */
3058         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
3059         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
3060
3061         set_bit(__IXGBEVF_DOWN, &adapter->state);
3062         return 0;
3063
3064 out:
3065         return err;
3066 }
3067
3068 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
3069         {                                                       \
3070                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
3071                 if (current_counter < last_counter)             \
3072                         counter += 0x100000000LL;               \
3073                 last_counter = current_counter;                 \
3074                 counter &= 0xFFFFFFFF00000000LL;                \
3075                 counter |= current_counter;                     \
3076         }
3077
3078 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
3079         {                                                                \
3080                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
3081                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
3082                 u64 current_counter = (current_counter_msb << 32) |      \
3083                         current_counter_lsb;                             \
3084                 if (current_counter < last_counter)                      \
3085                         counter += 0x1000000000LL;                       \
3086                 last_counter = current_counter;                          \
3087                 counter &= 0xFFFFFFF000000000LL;                         \
3088                 counter |= current_counter;                              \
3089         }
3090 /**
3091  * ixgbevf_update_stats - Update the board statistics counters.
3092  * @adapter: board private structure
3093  **/
3094 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
3095 {
3096         struct ixgbe_hw *hw = &adapter->hw;
3097         u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
3098         u64 alloc_rx_page = 0, hw_csum_rx_error = 0;
3099         int i;
3100
3101         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3102             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3103                 return;
3104
3105         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
3106                                 adapter->stats.vfgprc);
3107         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
3108                                 adapter->stats.vfgptc);
3109         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
3110                                 adapter->stats.last_vfgorc,
3111                                 adapter->stats.vfgorc);
3112         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
3113                                 adapter->stats.last_vfgotc,
3114                                 adapter->stats.vfgotc);
3115         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
3116                                 adapter->stats.vfmprc);
3117
3118         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
3119                 struct ixgbevf_ring *rx_ring = adapter->rx_ring[i];
3120
3121                 hw_csum_rx_error += rx_ring->rx_stats.csum_err;
3122                 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
3123                 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
3124                 alloc_rx_page += rx_ring->rx_stats.alloc_rx_page;
3125         }
3126
3127         adapter->hw_csum_rx_error = hw_csum_rx_error;
3128         adapter->alloc_rx_page_failed = alloc_rx_page_failed;
3129         adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
3130         adapter->alloc_rx_page = alloc_rx_page;
3131 }
3132
3133 /**
3134  * ixgbevf_service_timer - Timer Call-back
3135  * @t: pointer to timer_list struct
3136  **/
3137 static void ixgbevf_service_timer(struct timer_list *t)
3138 {
3139         struct ixgbevf_adapter *adapter = from_timer(adapter, t,
3140                                                      service_timer);
3141
3142         /* Reset the timer */
3143         mod_timer(&adapter->service_timer, (HZ * 2) + jiffies);
3144
3145         ixgbevf_service_event_schedule(adapter);
3146 }
3147
3148 static void ixgbevf_reset_subtask(struct ixgbevf_adapter *adapter)
3149 {
3150         if (!test_and_clear_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state))
3151                 return;
3152
3153         rtnl_lock();
3154         /* If we're already down or resetting, just bail */
3155         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3156             test_bit(__IXGBEVF_REMOVING, &adapter->state) ||
3157             test_bit(__IXGBEVF_RESETTING, &adapter->state)) {
3158                 rtnl_unlock();
3159                 return;
3160         }
3161
3162         adapter->tx_timeout_count++;
3163
3164         ixgbevf_reinit_locked(adapter);
3165         rtnl_unlock();
3166 }
3167
3168 /**
3169  * ixgbevf_check_hang_subtask - check for hung queues and dropped interrupts
3170  * @adapter: pointer to the device adapter structure
3171  *
3172  * This function serves two purposes.  First it strobes the interrupt lines
3173  * in order to make certain interrupts are occurring.  Secondly it sets the
3174  * bits needed to check for TX hangs.  As a result we should immediately
3175  * determine if a hang has occurred.
3176  **/
3177 static void ixgbevf_check_hang_subtask(struct ixgbevf_adapter *adapter)
3178 {
3179         struct ixgbe_hw *hw = &adapter->hw;
3180         u32 eics = 0;
3181         int i;
3182
3183         /* If we're down or resetting, just bail */
3184         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3185             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3186                 return;
3187
3188         /* Force detection of hung controller */
3189         if (netif_carrier_ok(adapter->netdev)) {
3190                 for (i = 0; i < adapter->num_tx_queues; i++)
3191                         set_check_for_tx_hang(adapter->tx_ring[i]);
3192                 for (i = 0; i < adapter->num_xdp_queues; i++)
3193                         set_check_for_tx_hang(adapter->xdp_ring[i]);
3194         }
3195
3196         /* get one bit for every active Tx/Rx interrupt vector */
3197         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
3198                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
3199
3200                 if (qv->rx.ring || qv->tx.ring)
3201                         eics |= BIT(i);
3202         }
3203
3204         /* Cause software interrupt to ensure rings are cleaned */
3205         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
3206 }
3207
3208 /**
3209  * ixgbevf_watchdog_update_link - update the link status
3210  * @adapter: pointer to the device adapter structure
3211  **/
3212 static void ixgbevf_watchdog_update_link(struct ixgbevf_adapter *adapter)
3213 {
3214         struct ixgbe_hw *hw = &adapter->hw;
3215         u32 link_speed = adapter->link_speed;
3216         bool link_up = adapter->link_up;
3217         s32 err;
3218
3219         spin_lock_bh(&adapter->mbx_lock);
3220
3221         err = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
3222
3223         spin_unlock_bh(&adapter->mbx_lock);
3224
3225         /* if check for link returns error we will need to reset */
3226         if (err && time_after(jiffies, adapter->last_reset + (10 * HZ))) {
3227                 set_bit(__IXGBEVF_RESET_REQUESTED, &adapter->state);
3228                 link_up = false;
3229         }
3230
3231         adapter->link_up = link_up;
3232         adapter->link_speed = link_speed;
3233 }
3234
3235 /**
3236  * ixgbevf_watchdog_link_is_up - update netif_carrier status and
3237  *                               print link up message
3238  * @adapter: pointer to the device adapter structure
3239  **/
3240 static void ixgbevf_watchdog_link_is_up(struct ixgbevf_adapter *adapter)
3241 {
3242         struct net_device *netdev = adapter->netdev;
3243
3244         /* only continue if link was previously down */
3245         if (netif_carrier_ok(netdev))
3246                 return;
3247
3248         dev_info(&adapter->pdev->dev, "NIC Link is Up %s\n",
3249                  (adapter->link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
3250                  "10 Gbps" :
3251                  (adapter->link_speed == IXGBE_LINK_SPEED_1GB_FULL) ?
3252                  "1 Gbps" :
3253                  (adapter->link_speed == IXGBE_LINK_SPEED_100_FULL) ?
3254                  "100 Mbps" :
3255                  "unknown speed");
3256
3257         netif_carrier_on(netdev);
3258 }
3259
3260 /**
3261  * ixgbevf_watchdog_link_is_down - update netif_carrier status and
3262  *                                 print link down message
3263  * @adapter: pointer to the adapter structure
3264  **/
3265 static void ixgbevf_watchdog_link_is_down(struct ixgbevf_adapter *adapter)
3266 {
3267         struct net_device *netdev = adapter->netdev;
3268
3269         adapter->link_speed = 0;
3270
3271         /* only continue if link was up previously */
3272         if (!netif_carrier_ok(netdev))
3273                 return;
3274
3275         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
3276
3277         netif_carrier_off(netdev);
3278 }
3279
3280 /**
3281  * ixgbevf_watchdog_subtask - worker thread to bring link up
3282  * @adapter: board private structure
3283  **/
3284 static void ixgbevf_watchdog_subtask(struct ixgbevf_adapter *adapter)
3285 {
3286         /* if interface is down do nothing */
3287         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3288             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3289                 return;
3290
3291         ixgbevf_watchdog_update_link(adapter);
3292
3293         if (adapter->link_up)
3294                 ixgbevf_watchdog_link_is_up(adapter);
3295         else
3296                 ixgbevf_watchdog_link_is_down(adapter);
3297
3298         ixgbevf_update_stats(adapter);
3299 }
3300
3301 /**
3302  * ixgbevf_service_task - manages and runs subtasks
3303  * @work: pointer to work_struct containing our data
3304  **/
3305 static void ixgbevf_service_task(struct work_struct *work)
3306 {
3307         struct ixgbevf_adapter *adapter = container_of(work,
3308                                                        struct ixgbevf_adapter,
3309                                                        service_task);
3310         struct ixgbe_hw *hw = &adapter->hw;
3311
3312         if (IXGBE_REMOVED(hw->hw_addr)) {
3313                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state)) {
3314                         rtnl_lock();
3315                         ixgbevf_down(adapter);
3316                         rtnl_unlock();
3317                 }
3318                 return;
3319         }
3320
3321         ixgbevf_queue_reset_subtask(adapter);
3322         ixgbevf_reset_subtask(adapter);
3323         ixgbevf_watchdog_subtask(adapter);
3324         ixgbevf_check_hang_subtask(adapter);
3325
3326         ixgbevf_service_event_complete(adapter);
3327 }
3328
3329 /**
3330  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
3331  * @tx_ring: Tx descriptor ring for a specific queue
3332  *
3333  * Free all transmit software resources
3334  **/
3335 void ixgbevf_free_tx_resources(struct ixgbevf_ring *tx_ring)
3336 {
3337         ixgbevf_clean_tx_ring(tx_ring);
3338
3339         vfree(tx_ring->tx_buffer_info);
3340         tx_ring->tx_buffer_info = NULL;
3341
3342         /* if not set, then don't free */
3343         if (!tx_ring->desc)
3344                 return;
3345
3346         dma_free_coherent(tx_ring->dev, tx_ring->size, tx_ring->desc,
3347                           tx_ring->dma);
3348
3349         tx_ring->desc = NULL;
3350 }
3351
3352 /**
3353  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
3354  * @adapter: board private structure
3355  *
3356  * Free all transmit software resources
3357  **/
3358 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
3359 {
3360         int i;
3361
3362         for (i = 0; i < adapter->num_tx_queues; i++)
3363                 if (adapter->tx_ring[i]->desc)
3364                         ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3365         for (i = 0; i < adapter->num_xdp_queues; i++)
3366                 if (adapter->xdp_ring[i]->desc)
3367                         ixgbevf_free_tx_resources(adapter->xdp_ring[i]);
3368 }
3369
3370 /**
3371  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
3372  * @tx_ring: Tx descriptor ring (for a specific queue) to setup
3373  *
3374  * Return 0 on success, negative on failure
3375  **/
3376 int ixgbevf_setup_tx_resources(struct ixgbevf_ring *tx_ring)
3377 {
3378         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3379         int size;
3380
3381         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
3382         tx_ring->tx_buffer_info = vmalloc(size);
3383         if (!tx_ring->tx_buffer_info)
3384                 goto err;
3385
3386         u64_stats_init(&tx_ring->syncp);
3387
3388         /* round up to nearest 4K */
3389         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
3390         tx_ring->size = ALIGN(tx_ring->size, 4096);
3391
3392         tx_ring->desc = dma_alloc_coherent(tx_ring->dev, tx_ring->size,
3393                                            &tx_ring->dma, GFP_KERNEL);
3394         if (!tx_ring->desc)
3395                 goto err;
3396
3397         return 0;
3398
3399 err:
3400         vfree(tx_ring->tx_buffer_info);
3401         tx_ring->tx_buffer_info = NULL;
3402         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit descriptor ring\n");
3403         return -ENOMEM;
3404 }
3405
3406 /**
3407  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
3408  * @adapter: board private structure
3409  *
3410  * If this function returns with an error, then it's possible one or
3411  * more of the rings is populated (while the rest are not).  It is the
3412  * callers duty to clean those orphaned rings.
3413  *
3414  * Return 0 on success, negative on failure
3415  **/
3416 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
3417 {
3418         int i, j = 0, err = 0;
3419
3420         for (i = 0; i < adapter->num_tx_queues; i++) {
3421                 err = ixgbevf_setup_tx_resources(adapter->tx_ring[i]);
3422                 if (!err)
3423                         continue;
3424                 hw_dbg(&adapter->hw, "Allocation for Tx Queue %u failed\n", i);
3425                 goto err_setup_tx;
3426         }
3427
3428         for (j = 0; j < adapter->num_xdp_queues; j++) {
3429                 err = ixgbevf_setup_tx_resources(adapter->xdp_ring[j]);
3430                 if (!err)
3431                         continue;
3432                 hw_dbg(&adapter->hw, "Allocation for XDP Queue %u failed\n", j);
3433                 goto err_setup_tx;
3434         }
3435
3436         return 0;
3437 err_setup_tx:
3438         /* rewind the index freeing the rings as we go */
3439         while (j--)
3440                 ixgbevf_free_tx_resources(adapter->xdp_ring[j]);
3441         while (i--)
3442                 ixgbevf_free_tx_resources(adapter->tx_ring[i]);
3443
3444         return err;
3445 }
3446
3447 /**
3448  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
3449  * @adapter: board private structure
3450  * @rx_ring: Rx descriptor ring (for a specific queue) to setup
3451  *
3452  * Returns 0 on success, negative on failure
3453  **/
3454 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
3455                                struct ixgbevf_ring *rx_ring)
3456 {
3457         int size;
3458
3459         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
3460         rx_ring->rx_buffer_info = vmalloc(size);
3461         if (!rx_ring->rx_buffer_info)
3462                 goto err;
3463
3464         u64_stats_init(&rx_ring->syncp);
3465
3466         /* Round up to nearest 4K */
3467         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
3468         rx_ring->size = ALIGN(rx_ring->size, 4096);
3469
3470         rx_ring->desc = dma_alloc_coherent(rx_ring->dev, rx_ring->size,
3471                                            &rx_ring->dma, GFP_KERNEL);
3472
3473         if (!rx_ring->desc)
3474                 goto err;
3475
3476         /* XDP RX-queue info */
3477         if (xdp_rxq_info_reg(&rx_ring->xdp_rxq, adapter->netdev,
3478                              rx_ring->queue_index) < 0)
3479                 goto err;
3480
3481         rx_ring->xdp_prog = adapter->xdp_prog;
3482
3483         return 0;
3484 err:
3485         vfree(rx_ring->rx_buffer_info);
3486         rx_ring->rx_buffer_info = NULL;
3487         dev_err(rx_ring->dev, "Unable to allocate memory for the Rx descriptor ring\n");
3488         return -ENOMEM;
3489 }
3490
3491 /**
3492  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
3493  * @adapter: board private structure
3494  *
3495  * If this function returns with an error, then it's possible one or
3496  * more of the rings is populated (while the rest are not).  It is the
3497  * callers duty to clean those orphaned rings.
3498  *
3499  * Return 0 on success, negative on failure
3500  **/
3501 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
3502 {
3503         int i, err = 0;
3504
3505         for (i = 0; i < adapter->num_rx_queues; i++) {
3506                 err = ixgbevf_setup_rx_resources(adapter, adapter->rx_ring[i]);
3507                 if (!err)
3508                         continue;
3509                 hw_dbg(&adapter->hw, "Allocation for Rx Queue %u failed\n", i);
3510                 goto err_setup_rx;
3511         }
3512
3513         return 0;
3514 err_setup_rx:
3515         /* rewind the index freeing the rings as we go */
3516         while (i--)
3517                 ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3518         return err;
3519 }
3520
3521 /**
3522  * ixgbevf_free_rx_resources - Free Rx Resources
3523  * @rx_ring: ring to clean the resources from
3524  *
3525  * Free all receive software resources
3526  **/
3527 void ixgbevf_free_rx_resources(struct ixgbevf_ring *rx_ring)
3528 {
3529         ixgbevf_clean_rx_ring(rx_ring);
3530
3531         rx_ring->xdp_prog = NULL;
3532         xdp_rxq_info_unreg(&rx_ring->xdp_rxq);
3533         vfree(rx_ring->rx_buffer_info);
3534         rx_ring->rx_buffer_info = NULL;
3535
3536         dma_free_coherent(rx_ring->dev, rx_ring->size, rx_ring->desc,
3537                           rx_ring->dma);
3538
3539         rx_ring->desc = NULL;
3540 }
3541
3542 /**
3543  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
3544  * @adapter: board private structure
3545  *
3546  * Free all receive software resources
3547  **/
3548 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
3549 {
3550         int i;
3551
3552         for (i = 0; i < adapter->num_rx_queues; i++)
3553                 if (adapter->rx_ring[i]->desc)
3554                         ixgbevf_free_rx_resources(adapter->rx_ring[i]);
3555 }
3556
3557 /**
3558  * ixgbevf_open - Called when a network interface is made active
3559  * @netdev: network interface device structure
3560  *
3561  * Returns 0 on success, negative value on failure
3562  *
3563  * The open entry point is called when a network interface is made
3564  * active by the system (IFF_UP).  At this point all resources needed
3565  * for transmit and receive operations are allocated, the interrupt
3566  * handler is registered with the OS, the watchdog timer is started,
3567  * and the stack is notified that the interface is ready.
3568  **/
3569 int ixgbevf_open(struct net_device *netdev)
3570 {
3571         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3572         struct ixgbe_hw *hw = &adapter->hw;
3573         int err;
3574
3575         /* A previous failure to open the device because of a lack of
3576          * available MSIX vector resources may have reset the number
3577          * of msix vectors variable to zero.  The only way to recover
3578          * is to unload/reload the driver and hope that the system has
3579          * been able to recover some MSIX vector resources.
3580          */
3581         if (!adapter->num_msix_vectors)
3582                 return -ENOMEM;
3583
3584         if (hw->adapter_stopped) {
3585                 ixgbevf_reset(adapter);
3586                 /* if adapter is still stopped then PF isn't up and
3587                  * the VF can't start.
3588                  */
3589                 if (hw->adapter_stopped) {
3590                         err = IXGBE_ERR_MBX;
3591                         pr_err("Unable to start - perhaps the PF Driver isn't up yet\n");
3592                         goto err_setup_reset;
3593                 }
3594         }
3595
3596         /* disallow open during test */
3597         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
3598                 return -EBUSY;
3599
3600         netif_carrier_off(netdev);
3601
3602         /* allocate transmit descriptors */
3603         err = ixgbevf_setup_all_tx_resources(adapter);
3604         if (err)
3605                 goto err_setup_tx;
3606
3607         /* allocate receive descriptors */
3608         err = ixgbevf_setup_all_rx_resources(adapter);
3609         if (err)
3610                 goto err_setup_rx;
3611
3612         ixgbevf_configure(adapter);
3613
3614         err = ixgbevf_request_irq(adapter);
3615         if (err)
3616                 goto err_req_irq;
3617
3618         /* Notify the stack of the actual queue counts. */
3619         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
3620         if (err)
3621                 goto err_set_queues;
3622
3623         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
3624         if (err)
3625                 goto err_set_queues;
3626
3627         ixgbevf_up_complete(adapter);
3628
3629         return 0;
3630
3631 err_set_queues:
3632         ixgbevf_free_irq(adapter);
3633 err_req_irq:
3634         ixgbevf_free_all_rx_resources(adapter);
3635 err_setup_rx:
3636         ixgbevf_free_all_tx_resources(adapter);
3637 err_setup_tx:
3638         ixgbevf_reset(adapter);
3639 err_setup_reset:
3640
3641         return err;
3642 }
3643
3644 /**
3645  * ixgbevf_close_suspend - actions necessary to both suspend and close flows
3646  * @adapter: the private adapter struct
3647  *
3648  * This function should contain the necessary work common to both suspending
3649  * and closing of the device.
3650  */
3651 static void ixgbevf_close_suspend(struct ixgbevf_adapter *adapter)
3652 {
3653         ixgbevf_down(adapter);
3654         ixgbevf_free_irq(adapter);
3655         ixgbevf_free_all_tx_resources(adapter);
3656         ixgbevf_free_all_rx_resources(adapter);
3657 }
3658
3659 /**
3660  * ixgbevf_close - Disables a network interface
3661  * @netdev: network interface device structure
3662  *
3663  * Returns 0, this is not allowed to fail
3664  *
3665  * The close entry point is called when an interface is de-activated
3666  * by the OS.  The hardware is still under the drivers control, but
3667  * needs to be disabled.  A global MAC reset is issued to stop the
3668  * hardware, and all transmit and receive resources are freed.
3669  **/
3670 int ixgbevf_close(struct net_device *netdev)
3671 {
3672         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3673
3674         if (netif_device_present(netdev))
3675                 ixgbevf_close_suspend(adapter);
3676
3677         return 0;
3678 }
3679
3680 static void ixgbevf_queue_reset_subtask(struct ixgbevf_adapter *adapter)
3681 {
3682         struct net_device *dev = adapter->netdev;
3683
3684         if (!test_and_clear_bit(__IXGBEVF_QUEUE_RESET_REQUESTED,
3685                                 &adapter->state))
3686                 return;
3687
3688         /* if interface is down do nothing */
3689         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
3690             test_bit(__IXGBEVF_RESETTING, &adapter->state))
3691                 return;
3692
3693         /* Hardware has to reinitialize queues and interrupts to
3694          * match packet buffer alignment. Unfortunately, the
3695          * hardware is not flexible enough to do this dynamically.
3696          */
3697         rtnl_lock();
3698
3699         if (netif_running(dev))
3700                 ixgbevf_close(dev);
3701
3702         ixgbevf_clear_interrupt_scheme(adapter);
3703         ixgbevf_init_interrupt_scheme(adapter);
3704
3705         if (netif_running(dev))
3706                 ixgbevf_open(dev);
3707
3708         rtnl_unlock();
3709 }
3710
3711 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
3712                                 u32 vlan_macip_lens, u32 fceof_saidx,
3713                                 u32 type_tucmd, u32 mss_l4len_idx)
3714 {
3715         struct ixgbe_adv_tx_context_desc *context_desc;
3716         u16 i = tx_ring->next_to_use;
3717
3718         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
3719
3720         i++;
3721         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
3722
3723         /* set bits to identify this as an advanced context descriptor */
3724         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
3725
3726         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
3727         context_desc->fceof_saidx       = cpu_to_le32(fceof_saidx);
3728         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
3729         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
3730 }
3731
3732 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
3733                        struct ixgbevf_tx_buffer *first,
3734                        u8 *hdr_len,
3735                        struct ixgbevf_ipsec_tx_data *itd)
3736 {
3737         u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
3738         struct sk_buff *skb = first->skb;
3739         union {
3740                 struct iphdr *v4;
3741                 struct ipv6hdr *v6;
3742                 unsigned char *hdr;
3743         } ip;
3744         union {
3745                 struct tcphdr *tcp;
3746                 unsigned char *hdr;
3747         } l4;
3748         u32 paylen, l4_offset;
3749         u32 fceof_saidx = 0;
3750         int err;
3751
3752         if (skb->ip_summed != CHECKSUM_PARTIAL)
3753                 return 0;
3754
3755         if (!skb_is_gso(skb))
3756                 return 0;
3757
3758         err = skb_cow_head(skb, 0);
3759         if (err < 0)
3760                 return err;
3761
3762         if (eth_p_mpls(first->protocol))
3763                 ip.hdr = skb_inner_network_header(skb);
3764         else
3765                 ip.hdr = skb_network_header(skb);
3766         l4.hdr = skb_checksum_start(skb);
3767
3768         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
3769         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3770
3771         /* initialize outer IP header fields */
3772         if (ip.v4->version == 4) {
3773                 unsigned char *csum_start = skb_checksum_start(skb);
3774                 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
3775                 int len = csum_start - trans_start;
3776
3777                 /* IP header will have to cancel out any data that
3778                  * is not a part of the outer IP header, so set to
3779                  * a reverse csum if needed, else init check to 0.
3780                  */
3781                 ip.v4->check = (skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL) ?
3782                                            csum_fold(csum_partial(trans_start,
3783                                                                   len, 0)) : 0;
3784                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3785
3786                 ip.v4->tot_len = 0;
3787                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3788                                    IXGBE_TX_FLAGS_CSUM |
3789                                    IXGBE_TX_FLAGS_IPV4;
3790         } else {
3791                 ip.v6->payload_len = 0;
3792                 first->tx_flags |= IXGBE_TX_FLAGS_TSO |
3793                                    IXGBE_TX_FLAGS_CSUM;
3794         }
3795
3796         /* determine offset of inner transport header */
3797         l4_offset = l4.hdr - skb->data;
3798
3799         /* compute length of segmentation header */
3800         *hdr_len = (l4.tcp->doff * 4) + l4_offset;
3801
3802         /* remove payload length from inner checksum */
3803         paylen = skb->len - l4_offset;
3804         csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
3805
3806         /* update gso size and bytecount with header size */
3807         first->gso_segs = skb_shinfo(skb)->gso_segs;
3808         first->bytecount += (first->gso_segs - 1) * *hdr_len;
3809
3810         /* mss_l4len_id: use 1 as index for TSO */
3811         mss_l4len_idx = (*hdr_len - l4_offset) << IXGBE_ADVTXD_L4LEN_SHIFT;
3812         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
3813         mss_l4len_idx |= (1u << IXGBE_ADVTXD_IDX_SHIFT);
3814
3815         fceof_saidx |= itd->pfsa;
3816         type_tucmd |= itd->flags | itd->trailer_len;
3817
3818         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
3819         vlan_macip_lens = l4.hdr - ip.hdr;
3820         vlan_macip_lens |= (ip.hdr - skb->data) << IXGBE_ADVTXD_MACLEN_SHIFT;
3821         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3822
3823         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens, fceof_saidx, type_tucmd,
3824                             mss_l4len_idx);
3825
3826         return 1;
3827 }
3828
3829 static inline bool ixgbevf_ipv6_csum_is_sctp(struct sk_buff *skb)
3830 {
3831         unsigned int offset = 0;
3832
3833         ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
3834
3835         return offset == skb_checksum_start_offset(skb);
3836 }
3837
3838 static void ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
3839                             struct ixgbevf_tx_buffer *first,
3840                             struct ixgbevf_ipsec_tx_data *itd)
3841 {
3842         struct sk_buff *skb = first->skb;
3843         u32 vlan_macip_lens = 0;
3844         u32 fceof_saidx = 0;
3845         u32 type_tucmd = 0;
3846
3847         if (skb->ip_summed != CHECKSUM_PARTIAL)
3848                 goto no_csum;
3849
3850         switch (skb->csum_offset) {
3851         case offsetof(struct tcphdr, check):
3852                 type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
3853                 /* fall through */
3854         case offsetof(struct udphdr, check):
3855                 break;
3856         case offsetof(struct sctphdr, checksum):
3857                 /* validate that this is actually an SCTP request */
3858                 if (((first->protocol == htons(ETH_P_IP)) &&
3859                      (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
3860                     ((first->protocol == htons(ETH_P_IPV6)) &&
3861                      ixgbevf_ipv6_csum_is_sctp(skb))) {
3862                         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_SCTP;
3863                         break;
3864                 }
3865                 /* fall through */
3866         default:
3867                 skb_checksum_help(skb);
3868                 goto no_csum;
3869         }
3870
3871         if (first->protocol == htons(ETH_P_IP))
3872                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
3873
3874         /* update TX checksum flag */
3875         first->tx_flags |= IXGBE_TX_FLAGS_CSUM;
3876         vlan_macip_lens = skb_checksum_start_offset(skb) -
3877                           skb_network_offset(skb);
3878 no_csum:
3879         /* vlan_macip_lens: MACLEN, VLAN tag */
3880         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
3881         vlan_macip_lens |= first->tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
3882
3883         fceof_saidx |= itd->pfsa;
3884         type_tucmd |= itd->flags | itd->trailer_len;
3885
3886         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
3887                             fceof_saidx, type_tucmd, 0);
3888 }
3889
3890 static __le32 ixgbevf_tx_cmd_type(u32 tx_flags)
3891 {
3892         /* set type for advanced descriptor with frame checksum insertion */
3893         __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
3894                                       IXGBE_ADVTXD_DCMD_IFCS |
3895                                       IXGBE_ADVTXD_DCMD_DEXT);
3896
3897         /* set HW VLAN bit if VLAN is present */
3898         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3899                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
3900
3901         /* set segmentation enable bits for TSO/FSO */
3902         if (tx_flags & IXGBE_TX_FLAGS_TSO)
3903                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
3904
3905         return cmd_type;
3906 }
3907
3908 static void ixgbevf_tx_olinfo_status(union ixgbe_adv_tx_desc *tx_desc,
3909                                      u32 tx_flags, unsigned int paylen)
3910 {
3911         __le32 olinfo_status = cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
3912
3913         /* enable L4 checksum for TSO and TX checksum offload */
3914         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3915                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
3916
3917         /* enble IPv4 checksum for TSO */
3918         if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3919                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
3920
3921         /* enable IPsec */
3922         if (tx_flags & IXGBE_TX_FLAGS_IPSEC)
3923                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IPSEC);
3924
3925         /* use index 1 context for TSO/FSO/FCOE/IPSEC */
3926         if (tx_flags & (IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_IPSEC))
3927                 olinfo_status |= cpu_to_le32(1u << IXGBE_ADVTXD_IDX_SHIFT);
3928
3929         /* Check Context must be set if Tx switch is enabled, which it
3930          * always is for case where virtual functions are running
3931          */
3932         olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
3933
3934         tx_desc->read.olinfo_status = olinfo_status;
3935 }
3936
3937 static void ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
3938                            struct ixgbevf_tx_buffer *first,
3939                            const u8 hdr_len)
3940 {
3941         struct sk_buff *skb = first->skb;
3942         struct ixgbevf_tx_buffer *tx_buffer;
3943         union ixgbe_adv_tx_desc *tx_desc;
3944         struct skb_frag_struct *frag;
3945         dma_addr_t dma;
3946         unsigned int data_len, size;
3947         u32 tx_flags = first->tx_flags;
3948         __le32 cmd_type = ixgbevf_tx_cmd_type(tx_flags);
3949         u16 i = tx_ring->next_to_use;
3950
3951         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3952
3953         ixgbevf_tx_olinfo_status(tx_desc, tx_flags, skb->len - hdr_len);
3954
3955         size = skb_headlen(skb);
3956         data_len = skb->data_len;
3957
3958         dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE);
3959
3960         tx_buffer = first;
3961
3962         for (frag = &skb_shinfo(skb)->frags[0];; frag++) {
3963                 if (dma_mapping_error(tx_ring->dev, dma))
3964                         goto dma_error;
3965
3966                 /* record length, and DMA address */
3967                 dma_unmap_len_set(tx_buffer, len, size);
3968                 dma_unmap_addr_set(tx_buffer, dma, dma);
3969
3970                 tx_desc->read.buffer_addr = cpu_to_le64(dma);
3971
3972                 while (unlikely(size > IXGBE_MAX_DATA_PER_TXD)) {
3973                         tx_desc->read.cmd_type_len =
3974                                 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
3975
3976                         i++;
3977                         tx_desc++;
3978                         if (i == tx_ring->count) {
3979                                 tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3980                                 i = 0;
3981                         }
3982                         tx_desc->read.olinfo_status = 0;
3983
3984                         dma += IXGBE_MAX_DATA_PER_TXD;
3985                         size -= IXGBE_MAX_DATA_PER_TXD;
3986
3987                         tx_desc->read.buffer_addr = cpu_to_le64(dma);
3988                 }
3989
3990                 if (likely(!data_len))
3991                         break;
3992
3993                 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
3994
3995                 i++;
3996                 tx_desc++;
3997                 if (i == tx_ring->count) {
3998                         tx_desc = IXGBEVF_TX_DESC(tx_ring, 0);
3999                         i = 0;
4000                 }
4001                 tx_desc->read.olinfo_status = 0;
4002
4003                 size = skb_frag_size(frag);
4004                 data_len -= size;
4005
4006                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size,
4007                                        DMA_TO_DEVICE);
4008
4009                 tx_buffer = &tx_ring->tx_buffer_info[i];
4010         }
4011
4012         /* write last descriptor with RS and EOP bits */
4013         cmd_type |= cpu_to_le32(size) | cpu_to_le32(IXGBE_TXD_CMD);
4014         tx_desc->read.cmd_type_len = cmd_type;
4015
4016         /* set the timestamp */
4017         first->time_stamp = jiffies;
4018
4019         skb_tx_timestamp(skb);
4020
4021         /* Force memory writes to complete before letting h/w know there
4022          * are new descriptors to fetch.  (Only applicable for weak-ordered
4023          * memory model archs, such as IA-64).
4024          *
4025          * We also need this memory barrier (wmb) to make certain all of the
4026          * status bits have been updated before next_to_watch is written.
4027          */
4028         wmb();
4029
4030         /* set next_to_watch value indicating a packet is present */
4031         first->next_to_watch = tx_desc;
4032
4033         i++;
4034         if (i == tx_ring->count)
4035                 i = 0;
4036
4037         tx_ring->next_to_use = i;
4038
4039         /* notify HW of packet */
4040         ixgbevf_write_tail(tx_ring, i);
4041
4042         return;
4043 dma_error:
4044         dev_err(tx_ring->dev, "TX DMA map failed\n");
4045         tx_buffer = &tx_ring->tx_buffer_info[i];
4046
4047         /* clear dma mappings for failed tx_buffer_info map */
4048         while (tx_buffer != first) {
4049                 if (dma_unmap_len(tx_buffer, len))
4050                         dma_unmap_page(tx_ring->dev,
4051                                        dma_unmap_addr(tx_buffer, dma),
4052                                        dma_unmap_len(tx_buffer, len),
4053                                        DMA_TO_DEVICE);
4054                 dma_unmap_len_set(tx_buffer, len, 0);
4055
4056                 if (i-- == 0)
4057                         i += tx_ring->count;
4058                 tx_buffer = &tx_ring->tx_buffer_info[i];
4059         }
4060
4061         if (dma_unmap_len(tx_buffer, len))
4062                 dma_unmap_single(tx_ring->dev,
4063                                  dma_unmap_addr(tx_buffer, dma),
4064                                  dma_unmap_len(tx_buffer, len),
4065                                  DMA_TO_DEVICE);
4066         dma_unmap_len_set(tx_buffer, len, 0);
4067
4068         dev_kfree_skb_any(tx_buffer->skb);
4069         tx_buffer->skb = NULL;
4070
4071         tx_ring->next_to_use = i;
4072 }
4073
4074 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4075 {
4076         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
4077         /* Herbert's original patch had:
4078          *  smp_mb__after_netif_stop_queue();
4079          * but since that doesn't exist yet, just open code it.
4080          */
4081         smp_mb();
4082
4083         /* We need to check again in a case another CPU has just
4084          * made room available.
4085          */
4086         if (likely(ixgbevf_desc_unused(tx_ring) < size))
4087                 return -EBUSY;
4088
4089         /* A reprieve! - use start_queue because it doesn't call schedule */
4090         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
4091         ++tx_ring->tx_stats.restart_queue;
4092
4093         return 0;
4094 }
4095
4096 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
4097 {
4098         if (likely(ixgbevf_desc_unused(tx_ring) >= size))
4099                 return 0;
4100         return __ixgbevf_maybe_stop_tx(tx_ring, size);
4101 }
4102
4103 static int ixgbevf_xmit_frame_ring(struct sk_buff *skb,
4104                                    struct ixgbevf_ring *tx_ring)
4105 {
4106         struct ixgbevf_tx_buffer *first;
4107         int tso;
4108         u32 tx_flags = 0;
4109         u16 count = TXD_USE_COUNT(skb_headlen(skb));
4110         struct ixgbevf_ipsec_tx_data ipsec_tx = { 0 };
4111 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4112         unsigned short f;
4113 #endif
4114         u8 hdr_len = 0;
4115         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
4116
4117         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
4118                 dev_kfree_skb_any(skb);
4119                 return NETDEV_TX_OK;
4120         }
4121
4122         /* need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
4123          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
4124          *       + 2 desc gap to keep tail from touching head,
4125          *       + 1 desc for context descriptor,
4126          * otherwise try next time
4127          */
4128 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
4129         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
4130                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
4131 #else
4132         count += skb_shinfo(skb)->nr_frags;
4133 #endif
4134         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
4135                 tx_ring->tx_stats.tx_busy++;
4136                 return NETDEV_TX_BUSY;
4137         }
4138
4139         /* record the location of the first descriptor for this packet */
4140         first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
4141         first->skb = skb;
4142         first->bytecount = skb->len;
4143         first->gso_segs = 1;
4144
4145         if (skb_vlan_tag_present(skb)) {
4146                 tx_flags |= skb_vlan_tag_get(skb);
4147                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
4148                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
4149         }
4150
4151         /* record initial flags and protocol */
4152         first->tx_flags = tx_flags;
4153         first->protocol = vlan_get_protocol(skb);
4154
4155 #ifdef CONFIG_IXGBEVF_IPSEC
4156         if (skb->sp && !ixgbevf_ipsec_tx(tx_ring, first, &ipsec_tx))
4157                 goto out_drop;
4158 #endif
4159         tso = ixgbevf_tso(tx_ring, first, &hdr_len, &ipsec_tx);
4160         if (tso < 0)
4161                 goto out_drop;
4162         else if (!tso)
4163                 ixgbevf_tx_csum(tx_ring, first, &ipsec_tx);
4164
4165         ixgbevf_tx_map(tx_ring, first, hdr_len);
4166
4167         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
4168
4169         return NETDEV_TX_OK;
4170
4171 out_drop:
4172         dev_kfree_skb_any(first->skb);
4173         first->skb = NULL;
4174
4175         return NETDEV_TX_OK;
4176 }
4177
4178 static netdev_tx_t ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
4179 {
4180         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4181         struct ixgbevf_ring *tx_ring;
4182
4183         if (skb->len <= 0) {
4184                 dev_kfree_skb_any(skb);
4185                 return NETDEV_TX_OK;
4186         }
4187
4188         /* The minimum packet size for olinfo paylen is 17 so pad the skb
4189          * in order to meet this minimum size requirement.
4190          */
4191         if (skb->len < 17) {
4192                 if (skb_padto(skb, 17))
4193                         return NETDEV_TX_OK;
4194                 skb->len = 17;
4195         }
4196
4197         tx_ring = adapter->tx_ring[skb->queue_mapping];
4198         return ixgbevf_xmit_frame_ring(skb, tx_ring);
4199 }
4200
4201 /**
4202  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
4203  * @netdev: network interface device structure
4204  * @p: pointer to an address structure
4205  *
4206  * Returns 0 on success, negative on failure
4207  **/
4208 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
4209 {
4210         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4211         struct ixgbe_hw *hw = &adapter->hw;
4212         struct sockaddr *addr = p;
4213         int err;
4214
4215         if (!is_valid_ether_addr(addr->sa_data))
4216                 return -EADDRNOTAVAIL;
4217
4218         spin_lock_bh(&adapter->mbx_lock);
4219
4220         err = hw->mac.ops.set_rar(hw, 0, addr->sa_data, 0);
4221
4222         spin_unlock_bh(&adapter->mbx_lock);
4223
4224         if (err)
4225                 return -EPERM;
4226
4227         ether_addr_copy(hw->mac.addr, addr->sa_data);
4228         ether_addr_copy(hw->mac.perm_addr, addr->sa_data);
4229         ether_addr_copy(netdev->dev_addr, addr->sa_data);
4230
4231         return 0;
4232 }
4233
4234 /**
4235  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
4236  * @netdev: network interface device structure
4237  * @new_mtu: new value for maximum frame size
4238  *
4239  * Returns 0 on success, negative on failure
4240  **/
4241 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
4242 {
4243         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4244         struct ixgbe_hw *hw = &adapter->hw;
4245         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4246         int ret;
4247
4248         /* prevent MTU being changed to a size unsupported by XDP */
4249         if (adapter->xdp_prog) {
4250                 dev_warn(&adapter->pdev->dev, "MTU cannot be changed while XDP program is loaded\n");
4251                 return -EPERM;
4252         }
4253
4254         spin_lock_bh(&adapter->mbx_lock);
4255         /* notify the PF of our intent to use this size of frame */
4256         ret = hw->mac.ops.set_rlpml(hw, max_frame);
4257         spin_unlock_bh(&adapter->mbx_lock);
4258         if (ret)
4259                 return -EINVAL;
4260
4261         hw_dbg(hw, "changing MTU from %d to %d\n",
4262                netdev->mtu, new_mtu);
4263
4264         /* must set new MTU before calling down or up */
4265         netdev->mtu = new_mtu;
4266
4267         if (netif_running(netdev))
4268                 ixgbevf_reinit_locked(adapter);
4269
4270         return 0;
4271 }
4272
4273 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
4274 {
4275         struct net_device *netdev = pci_get_drvdata(pdev);
4276         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4277 #ifdef CONFIG_PM
4278         int retval = 0;
4279 #endif
4280
4281         rtnl_lock();
4282         netif_device_detach(netdev);
4283
4284         if (netif_running(netdev))
4285                 ixgbevf_close_suspend(adapter);
4286
4287         ixgbevf_clear_interrupt_scheme(adapter);
4288         rtnl_unlock();
4289
4290 #ifdef CONFIG_PM
4291         retval = pci_save_state(pdev);
4292         if (retval)
4293                 return retval;
4294
4295 #endif
4296         if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4297                 pci_disable_device(pdev);
4298
4299         return 0;
4300 }
4301
4302 #ifdef CONFIG_PM
4303 static int ixgbevf_resume(struct pci_dev *pdev)
4304 {
4305         struct net_device *netdev = pci_get_drvdata(pdev);
4306         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4307         u32 err;
4308
4309         pci_restore_state(pdev);
4310         /* pci_restore_state clears dev->state_saved so call
4311          * pci_save_state to restore it.
4312          */
4313         pci_save_state(pdev);
4314
4315         err = pci_enable_device_mem(pdev);
4316         if (err) {
4317                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
4318                 return err;
4319         }
4320
4321         adapter->hw.hw_addr = adapter->io_addr;
4322         smp_mb__before_atomic();
4323         clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4324         pci_set_master(pdev);
4325
4326         ixgbevf_reset(adapter);
4327
4328         rtnl_lock();
4329         err = ixgbevf_init_interrupt_scheme(adapter);
4330         if (!err && netif_running(netdev))
4331                 err = ixgbevf_open(netdev);
4332         rtnl_unlock();
4333         if (err)
4334                 return err;
4335
4336         netif_device_attach(netdev);
4337
4338         return err;
4339 }
4340
4341 #endif /* CONFIG_PM */
4342 static void ixgbevf_shutdown(struct pci_dev *pdev)
4343 {
4344         ixgbevf_suspend(pdev, PMSG_SUSPEND);
4345 }
4346
4347 static void ixgbevf_get_tx_ring_stats(struct rtnl_link_stats64 *stats,
4348                                       const struct ixgbevf_ring *ring)
4349 {
4350         u64 bytes, packets;
4351         unsigned int start;
4352
4353         if (ring) {
4354                 do {
4355                         start = u64_stats_fetch_begin_irq(&ring->syncp);
4356                         bytes = ring->stats.bytes;
4357                         packets = ring->stats.packets;
4358                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4359                 stats->tx_bytes += bytes;
4360                 stats->tx_packets += packets;
4361         }
4362 }
4363
4364 static void ixgbevf_get_stats(struct net_device *netdev,
4365                               struct rtnl_link_stats64 *stats)
4366 {
4367         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4368         unsigned int start;
4369         u64 bytes, packets;
4370         const struct ixgbevf_ring *ring;
4371         int i;
4372
4373         ixgbevf_update_stats(adapter);
4374
4375         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
4376
4377         rcu_read_lock();
4378         for (i = 0; i < adapter->num_rx_queues; i++) {
4379                 ring = adapter->rx_ring[i];
4380                 do {
4381                         start = u64_stats_fetch_begin_irq(&ring->syncp);
4382                         bytes = ring->stats.bytes;
4383                         packets = ring->stats.packets;
4384                 } while (u64_stats_fetch_retry_irq(&ring->syncp, start));
4385                 stats->rx_bytes += bytes;
4386                 stats->rx_packets += packets;
4387         }
4388
4389         for (i = 0; i < adapter->num_tx_queues; i++) {
4390                 ring = adapter->tx_ring[i];
4391                 ixgbevf_get_tx_ring_stats(stats, ring);
4392         }
4393
4394         for (i = 0; i < adapter->num_xdp_queues; i++) {
4395                 ring = adapter->xdp_ring[i];
4396                 ixgbevf_get_tx_ring_stats(stats, ring);
4397         }
4398         rcu_read_unlock();
4399 }
4400
4401 #define IXGBEVF_MAX_MAC_HDR_LEN         127
4402 #define IXGBEVF_MAX_NETWORK_HDR_LEN     511
4403
4404 static netdev_features_t
4405 ixgbevf_features_check(struct sk_buff *skb, struct net_device *dev,
4406                        netdev_features_t features)
4407 {
4408         unsigned int network_hdr_len, mac_hdr_len;
4409
4410         /* Make certain the headers can be described by a context descriptor */
4411         mac_hdr_len = skb_network_header(skb) - skb->data;
4412         if (unlikely(mac_hdr_len > IXGBEVF_MAX_MAC_HDR_LEN))
4413                 return features & ~(NETIF_F_HW_CSUM |
4414                                     NETIF_F_SCTP_CRC |
4415                                     NETIF_F_HW_VLAN_CTAG_TX |
4416                                     NETIF_F_TSO |
4417                                     NETIF_F_TSO6);
4418
4419         network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
4420         if (unlikely(network_hdr_len >  IXGBEVF_MAX_NETWORK_HDR_LEN))
4421                 return features & ~(NETIF_F_HW_CSUM |
4422                                     NETIF_F_SCTP_CRC |
4423                                     NETIF_F_TSO |
4424                                     NETIF_F_TSO6);
4425
4426         /* We can only support IPV4 TSO in tunnels if we can mangle the
4427          * inner IP ID field, so strip TSO if MANGLEID is not supported.
4428          */
4429         if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
4430                 features &= ~NETIF_F_TSO;
4431
4432         return features;
4433 }
4434
4435 static int ixgbevf_xdp_setup(struct net_device *dev, struct bpf_prog *prog)
4436 {
4437         int i, frame_size = dev->mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
4438         struct ixgbevf_adapter *adapter = netdev_priv(dev);
4439         struct bpf_prog *old_prog;
4440
4441         /* verify ixgbevf ring attributes are sufficient for XDP */
4442         for (i = 0; i < adapter->num_rx_queues; i++) {
4443                 struct ixgbevf_ring *ring = adapter->rx_ring[i];
4444
4445                 if (frame_size > ixgbevf_rx_bufsz(ring))
4446                         return -EINVAL;
4447         }
4448
4449         old_prog = xchg(&adapter->xdp_prog, prog);
4450
4451         /* If transitioning XDP modes reconfigure rings */
4452         if (!!prog != !!old_prog) {
4453                 /* Hardware has to reinitialize queues and interrupts to
4454                  * match packet buffer alignment. Unfortunately, the
4455                  * hardware is not flexible enough to do this dynamically.
4456                  */
4457                 if (netif_running(dev))
4458                         ixgbevf_close(dev);
4459
4460                 ixgbevf_clear_interrupt_scheme(adapter);
4461                 ixgbevf_init_interrupt_scheme(adapter);
4462
4463                 if (netif_running(dev))
4464                         ixgbevf_open(dev);
4465         } else {
4466                 for (i = 0; i < adapter->num_rx_queues; i++)
4467                         xchg(&adapter->rx_ring[i]->xdp_prog, adapter->xdp_prog);
4468         }
4469
4470         if (old_prog)
4471                 bpf_prog_put(old_prog);
4472
4473         return 0;
4474 }
4475
4476 static int ixgbevf_xdp(struct net_device *dev, struct netdev_bpf *xdp)
4477 {
4478         struct ixgbevf_adapter *adapter = netdev_priv(dev);
4479
4480         switch (xdp->command) {
4481         case XDP_SETUP_PROG:
4482                 return ixgbevf_xdp_setup(dev, xdp->prog);
4483         case XDP_QUERY_PROG:
4484                 xdp->prog_id = adapter->xdp_prog ?
4485                                adapter->xdp_prog->aux->id : 0;
4486                 return 0;
4487         default:
4488                 return -EINVAL;
4489         }
4490 }
4491
4492 static const struct net_device_ops ixgbevf_netdev_ops = {
4493         .ndo_open               = ixgbevf_open,
4494         .ndo_stop               = ixgbevf_close,
4495         .ndo_start_xmit         = ixgbevf_xmit_frame,
4496         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
4497         .ndo_get_stats64        = ixgbevf_get_stats,
4498         .ndo_validate_addr      = eth_validate_addr,
4499         .ndo_set_mac_address    = ixgbevf_set_mac,
4500         .ndo_change_mtu         = ixgbevf_change_mtu,
4501         .ndo_tx_timeout         = ixgbevf_tx_timeout,
4502         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
4503         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
4504         .ndo_features_check     = ixgbevf_features_check,
4505         .ndo_bpf                = ixgbevf_xdp,
4506 };
4507
4508 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
4509 {
4510         dev->netdev_ops = &ixgbevf_netdev_ops;
4511         ixgbevf_set_ethtool_ops(dev);
4512         dev->watchdog_timeo = 5 * HZ;
4513 }
4514
4515 /**
4516  * ixgbevf_probe - Device Initialization Routine
4517  * @pdev: PCI device information struct
4518  * @ent: entry in ixgbevf_pci_tbl
4519  *
4520  * Returns 0 on success, negative on failure
4521  *
4522  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
4523  * The OS initialization, configuring of the adapter private structure,
4524  * and a hardware reset occur.
4525  **/
4526 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
4527 {
4528         struct net_device *netdev;
4529         struct ixgbevf_adapter *adapter = NULL;
4530         struct ixgbe_hw *hw = NULL;
4531         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
4532         int err, pci_using_dac;
4533         bool disable_dev = false;
4534
4535         err = pci_enable_device(pdev);
4536         if (err)
4537                 return err;
4538
4539         if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
4540                 pci_using_dac = 1;
4541         } else {
4542                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
4543                 if (err) {
4544                         dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
4545                         goto err_dma;
4546                 }
4547                 pci_using_dac = 0;
4548         }
4549
4550         err = pci_request_regions(pdev, ixgbevf_driver_name);
4551         if (err) {
4552                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
4553                 goto err_pci_reg;
4554         }
4555
4556         pci_set_master(pdev);
4557
4558         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
4559                                    MAX_TX_QUEUES);
4560         if (!netdev) {
4561                 err = -ENOMEM;
4562                 goto err_alloc_etherdev;
4563         }
4564
4565         SET_NETDEV_DEV(netdev, &pdev->dev);
4566
4567         adapter = netdev_priv(netdev);
4568
4569         adapter->netdev = netdev;
4570         adapter->pdev = pdev;
4571         hw = &adapter->hw;
4572         hw->back = adapter;
4573         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
4574
4575         /* call save state here in standalone driver because it relies on
4576          * adapter struct to exist, and needs to call netdev_priv
4577          */
4578         pci_save_state(pdev);
4579
4580         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
4581                               pci_resource_len(pdev, 0));
4582         adapter->io_addr = hw->hw_addr;
4583         if (!hw->hw_addr) {
4584                 err = -EIO;
4585                 goto err_ioremap;
4586         }
4587
4588         ixgbevf_assign_netdev_ops(netdev);
4589
4590         /* Setup HW API */
4591         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
4592         hw->mac.type  = ii->mac;
4593
4594         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
4595                sizeof(struct ixgbe_mbx_operations));
4596
4597         /* setup the private structure */
4598         err = ixgbevf_sw_init(adapter);
4599         if (err)
4600                 goto err_sw_init;
4601
4602         /* The HW MAC address was set and/or determined in sw_init */
4603         if (!is_valid_ether_addr(netdev->dev_addr)) {
4604                 pr_err("invalid MAC address\n");
4605                 err = -EIO;
4606                 goto err_sw_init;
4607         }
4608
4609         netdev->hw_features = NETIF_F_SG |
4610                               NETIF_F_TSO |
4611                               NETIF_F_TSO6 |
4612                               NETIF_F_RXCSUM |
4613                               NETIF_F_HW_CSUM |
4614                               NETIF_F_SCTP_CRC;
4615
4616 #define IXGBEVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
4617                                       NETIF_F_GSO_GRE_CSUM | \
4618                                       NETIF_F_GSO_IPXIP4 | \
4619                                       NETIF_F_GSO_IPXIP6 | \
4620                                       NETIF_F_GSO_UDP_TUNNEL | \
4621                                       NETIF_F_GSO_UDP_TUNNEL_CSUM)
4622
4623         netdev->gso_partial_features = IXGBEVF_GSO_PARTIAL_FEATURES;
4624         netdev->hw_features |= NETIF_F_GSO_PARTIAL |
4625                                IXGBEVF_GSO_PARTIAL_FEATURES;
4626
4627         netdev->features = netdev->hw_features;
4628
4629         if (pci_using_dac)
4630                 netdev->features |= NETIF_F_HIGHDMA;
4631
4632         netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
4633         netdev->mpls_features |= NETIF_F_SG |
4634                                  NETIF_F_TSO |
4635                                  NETIF_F_TSO6 |
4636                                  NETIF_F_HW_CSUM;
4637         netdev->mpls_features |= IXGBEVF_GSO_PARTIAL_FEATURES;
4638         netdev->hw_enc_features |= netdev->vlan_features;
4639
4640         /* set this bit last since it cannot be part of vlan_features */
4641         netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
4642                             NETIF_F_HW_VLAN_CTAG_RX |
4643                             NETIF_F_HW_VLAN_CTAG_TX;
4644
4645         netdev->priv_flags |= IFF_UNICAST_FLT;
4646
4647         /* MTU range: 68 - 1504 or 9710 */
4648         netdev->min_mtu = ETH_MIN_MTU;
4649         switch (adapter->hw.api_version) {
4650         case ixgbe_mbox_api_11:
4651         case ixgbe_mbox_api_12:
4652         case ixgbe_mbox_api_13:
4653         case ixgbe_mbox_api_14:
4654                 netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4655                                   (ETH_HLEN + ETH_FCS_LEN);
4656                 break;
4657         default:
4658                 if (adapter->hw.mac.type != ixgbe_mac_82599_vf)
4659                         netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
4660                                           (ETH_HLEN + ETH_FCS_LEN);
4661                 else
4662                         netdev->max_mtu = ETH_DATA_LEN + ETH_FCS_LEN;
4663                 break;
4664         }
4665
4666         if (IXGBE_REMOVED(hw->hw_addr)) {
4667                 err = -EIO;
4668                 goto err_sw_init;
4669         }
4670
4671         timer_setup(&adapter->service_timer, ixgbevf_service_timer, 0);
4672
4673         INIT_WORK(&adapter->service_task, ixgbevf_service_task);
4674         set_bit(__IXGBEVF_SERVICE_INITED, &adapter->state);
4675         clear_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state);
4676
4677         err = ixgbevf_init_interrupt_scheme(adapter);
4678         if (err)
4679                 goto err_sw_init;
4680
4681         strcpy(netdev->name, "eth%d");
4682
4683         err = register_netdev(netdev);
4684         if (err)
4685                 goto err_register;
4686
4687         pci_set_drvdata(pdev, netdev);
4688         netif_carrier_off(netdev);
4689         ixgbevf_init_ipsec_offload(adapter);
4690
4691         ixgbevf_init_last_counter_stats(adapter);
4692
4693         /* print the VF info */
4694         dev_info(&pdev->dev, "%pM\n", netdev->dev_addr);
4695         dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
4696
4697         switch (hw->mac.type) {
4698         case ixgbe_mac_X550_vf:
4699                 dev_info(&pdev->dev, "Intel(R) X550 Virtual Function\n");
4700                 break;
4701         case ixgbe_mac_X540_vf:
4702                 dev_info(&pdev->dev, "Intel(R) X540 Virtual Function\n");
4703                 break;
4704         case ixgbe_mac_82599_vf:
4705         default:
4706                 dev_info(&pdev->dev, "Intel(R) 82599 Virtual Function\n");
4707                 break;
4708         }
4709
4710         return 0;
4711
4712 err_register:
4713         ixgbevf_clear_interrupt_scheme(adapter);
4714 err_sw_init:
4715         ixgbevf_reset_interrupt_capability(adapter);
4716         iounmap(adapter->io_addr);
4717         kfree(adapter->rss_key);
4718 err_ioremap:
4719         disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4720         free_netdev(netdev);
4721 err_alloc_etherdev:
4722         pci_release_regions(pdev);
4723 err_pci_reg:
4724 err_dma:
4725         if (!adapter || disable_dev)
4726                 pci_disable_device(pdev);
4727         return err;
4728 }
4729
4730 /**
4731  * ixgbevf_remove - Device Removal Routine
4732  * @pdev: PCI device information struct
4733  *
4734  * ixgbevf_remove is called by the PCI subsystem to alert the driver
4735  * that it should release a PCI device.  The could be caused by a
4736  * Hot-Plug event, or because the driver is going to be removed from
4737  * memory.
4738  **/
4739 static void ixgbevf_remove(struct pci_dev *pdev)
4740 {
4741         struct net_device *netdev = pci_get_drvdata(pdev);
4742         struct ixgbevf_adapter *adapter;
4743         bool disable_dev;
4744
4745         if (!netdev)
4746                 return;
4747
4748         adapter = netdev_priv(netdev);
4749
4750         set_bit(__IXGBEVF_REMOVING, &adapter->state);
4751         cancel_work_sync(&adapter->service_task);
4752
4753         if (netdev->reg_state == NETREG_REGISTERED)
4754                 unregister_netdev(netdev);
4755
4756         ixgbevf_stop_ipsec_offload(adapter);
4757         ixgbevf_clear_interrupt_scheme(adapter);
4758         ixgbevf_reset_interrupt_capability(adapter);
4759
4760         iounmap(adapter->io_addr);
4761         pci_release_regions(pdev);
4762
4763         hw_dbg(&adapter->hw, "Remove complete\n");
4764
4765         kfree(adapter->rss_key);
4766         disable_dev = !test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state);
4767         free_netdev(netdev);
4768
4769         if (disable_dev)
4770                 pci_disable_device(pdev);
4771 }
4772
4773 /**
4774  * ixgbevf_io_error_detected - called when PCI error is detected
4775  * @pdev: Pointer to PCI device
4776  * @state: The current pci connection state
4777  *
4778  * This function is called after a PCI bus error affecting
4779  * this device has been detected.
4780  **/
4781 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
4782                                                   pci_channel_state_t state)
4783 {
4784         struct net_device *netdev = pci_get_drvdata(pdev);
4785         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4786
4787         if (!test_bit(__IXGBEVF_SERVICE_INITED, &adapter->state))
4788                 return PCI_ERS_RESULT_DISCONNECT;
4789
4790         rtnl_lock();
4791         netif_device_detach(netdev);
4792
4793         if (netif_running(netdev))
4794                 ixgbevf_close_suspend(adapter);
4795
4796         if (state == pci_channel_io_perm_failure) {
4797                 rtnl_unlock();
4798                 return PCI_ERS_RESULT_DISCONNECT;
4799         }
4800
4801         if (!test_and_set_bit(__IXGBEVF_DISABLED, &adapter->state))
4802                 pci_disable_device(pdev);
4803         rtnl_unlock();
4804
4805         /* Request a slot slot reset. */
4806         return PCI_ERS_RESULT_NEED_RESET;
4807 }
4808
4809 /**
4810  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
4811  * @pdev: Pointer to PCI device
4812  *
4813  * Restart the card from scratch, as if from a cold-boot. Implementation
4814  * resembles the first-half of the ixgbevf_resume routine.
4815  **/
4816 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
4817 {
4818         struct net_device *netdev = pci_get_drvdata(pdev);
4819         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
4820
4821         if (pci_enable_device_mem(pdev)) {
4822                 dev_err(&pdev->dev,
4823                         "Cannot re-enable PCI device after reset.\n");
4824                 return PCI_ERS_RESULT_DISCONNECT;
4825         }
4826
4827         adapter->hw.hw_addr = adapter->io_addr;
4828         smp_mb__before_atomic();
4829         clear_bit(__IXGBEVF_DISABLED, &adapter->state);
4830         pci_set_master(pdev);
4831
4832         ixgbevf_reset(adapter);
4833
4834         return PCI_ERS_RESULT_RECOVERED;
4835 }
4836
4837 /**
4838  * ixgbevf_io_resume - called when traffic can start flowing again.
4839  * @pdev: Pointer to PCI device
4840  *
4841  * This callback is called when the error recovery driver tells us that
4842  * its OK to resume normal operation. Implementation resembles the
4843  * second-half of the ixgbevf_resume routine.
4844  **/
4845 static void ixgbevf_io_resume(struct pci_dev *pdev)
4846 {
4847         struct net_device *netdev = pci_get_drvdata(pdev);
4848
4849         rtnl_lock();
4850         if (netif_running(netdev))
4851                 ixgbevf_open(netdev);
4852
4853         netif_device_attach(netdev);
4854         rtnl_unlock();
4855 }
4856
4857 /* PCI Error Recovery (ERS) */
4858 static const struct pci_error_handlers ixgbevf_err_handler = {
4859         .error_detected = ixgbevf_io_error_detected,
4860         .slot_reset = ixgbevf_io_slot_reset,
4861         .resume = ixgbevf_io_resume,
4862 };
4863
4864 static struct pci_driver ixgbevf_driver = {
4865         .name           = ixgbevf_driver_name,
4866         .id_table       = ixgbevf_pci_tbl,
4867         .probe          = ixgbevf_probe,
4868         .remove         = ixgbevf_remove,
4869 #ifdef CONFIG_PM
4870         /* Power Management Hooks */
4871         .suspend        = ixgbevf_suspend,
4872         .resume         = ixgbevf_resume,
4873 #endif
4874         .shutdown       = ixgbevf_shutdown,
4875         .err_handler    = &ixgbevf_err_handler
4876 };
4877
4878 /**
4879  * ixgbevf_init_module - Driver Registration Routine
4880  *
4881  * ixgbevf_init_module is the first routine called when the driver is
4882  * loaded. All it does is register with the PCI subsystem.
4883  **/
4884 static int __init ixgbevf_init_module(void)
4885 {
4886         pr_info("%s - version %s\n", ixgbevf_driver_string,
4887                 ixgbevf_driver_version);
4888
4889         pr_info("%s\n", ixgbevf_copyright);
4890         ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
4891         if (!ixgbevf_wq) {
4892                 pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
4893                 return -ENOMEM;
4894         }
4895
4896         return pci_register_driver(&ixgbevf_driver);
4897 }
4898
4899 module_init(ixgbevf_init_module);
4900
4901 /**
4902  * ixgbevf_exit_module - Driver Exit Cleanup Routine
4903  *
4904  * ixgbevf_exit_module is called just before the driver is removed
4905  * from memory.
4906  **/
4907 static void __exit ixgbevf_exit_module(void)
4908 {
4909         pci_unregister_driver(&ixgbevf_driver);
4910         if (ixgbevf_wq) {
4911                 destroy_workqueue(ixgbevf_wq);
4912                 ixgbevf_wq = NULL;
4913         }
4914 }
4915
4916 #ifdef DEBUG
4917 /**
4918  * ixgbevf_get_hw_dev_name - return device name string
4919  * used by hardware layer to print debugging information
4920  * @hw: pointer to private hardware struct
4921  **/
4922 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
4923 {
4924         struct ixgbevf_adapter *adapter = hw->back;
4925
4926         return adapter->netdev->name;
4927 }
4928
4929 #endif
4930 module_exit(ixgbevf_exit_module);
4931
4932 /* ixgbevf_main.c */